verify/ds/segtree/range_update_range_product.test.cpp

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Last update: 2026-10-06 01:57:24+09:00
Problem: https://judge.yosupo.jp/problem/range_set_range_composite

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Code

#define PROBLEM "https://judge.yosupo.jp/problem/range_set_range_composite"

#include "../../../acted_monoid/range_update_range_product.hpp"
#include "../../../ds/segtree/lazy_segtree.hpp"

#include <algorithm>
#include <cassert>
#include <cstdint>
#include <utility>
#include <vector>

#include "../../../acted_monoid/concept.hpp"
#include "../../../math/modint.hpp"
#include "../../../utilities/fast_io.hpp"

namespace {

using Mint = m1une::math::modint998244353;
using Function = std::pair<Mint, Mint>;

struct AffineComposition {
    using value_type = Function;

    static value_type id() {
        return {Mint(1), Mint(0)};
    }

    static value_type op(const value_type& left, const value_type& right) {
        return {
            right.first * left.first,
            right.first * left.second + right.second
        };
    }
};

using AM = m1une::acted_monoid::RangeUpdateRangeProduct<AffineComposition>;
static_assert(m1une::acted_monoid::IsActedMonoid<AM>);

Function naive_product(const std::vector<Function>& values, int left, int right) {
    Function result = AffineComposition::id();
    for (int i = left; i < right; i++) {
        result = AffineComposition::op(result, values[i]);
    }
    return result;
}

void test_randomized() {
    std::vector<Function> no_values;
    m1une::ds::LazySegtree<AM> empty(no_values);
    assert(empty.empty());
    assert(empty.prod(0, 0).product == AffineComposition::id());
    assert(empty.prod(0, 0).size == 0);

    std::uint64_t state = 20260716;
    auto random = [&state]() {
        state ^= state << 7;
        state ^= state >> 9;
        return state;
    };

    for (int trial = 0; trial < 120; trial++) {
        int size = 1 + int(random() % 25);
        std::vector<Function> values(size);
        for (Function& value : values) {
            value = Function{Mint(random() % 20), Mint(random() % 20)};
        }
        m1une::ds::LazySegtree<AM> seg(values);

        for (int operation = 0; operation < 200; operation++) {
            int left = int(random() % (size + 1));
            int right = int(random() % (size + 1));
            if (left > right) std::swap(left, right);

            if ((random() & 1U) == 0) {
                Function value = {Mint(random() % 20), Mint(random() % 20)};
                seg.apply(left, right, value);
                for (int i = left; i < right; i++) values[i] = value;
            } else {
                auto actual = seg.prod(left, right);
                assert(actual.product == naive_product(values, left, right));
                assert(actual.size == right - left);
            }

            auto all = seg.all_prod();
            assert(all.product == naive_product(values, 0, size));
            assert(all.size == size);
        }
    }
}

}  // namespace

int main() {
    m1une::utilities::FastInput fast_input;
    m1une::utilities::FastOutput fast_output;

    test_randomized();

    int n, q;
    fast_input >> n >> q;
    std::vector<Function> functions(n);
    for (Function& function : functions) {
        int a, b;
        fast_input >> a >> b;
        function = Function{Mint(a), Mint(b)};
    }

    m1une::ds::LazySegtree<AM> seg(functions);
    while (q--) {
        int type, left, right;
        fast_input >> type >> left >> right;
        if (type == 0) {
            int c, d;
            fast_input >> c >> d;
            seg.apply(left, right, Function{Mint(c), Mint(d)});
        } else {
            int x;
            fast_input >> x;
            Function function = seg.prod(left, right).product;
            fast_output << function.first * Mint(x) + function.second << '\n';
        }
    }
}

#line 1 "verify/ds/segtree/range_update_range_product.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/range_set_range_composite"

#line 1 "acted_monoid/range_update_range_product.hpp"



#include <optional>

#line 1 "monoid/concept.hpp"



#include <concepts>

namespace m1une {
namespace monoid {

// Concept to check if a type satisfies the requirements of a Monoid.
// A Monoid must have a `value_type`, an identity element `id()`, and an associative binary operation `op()`.
template <typename M>
concept IsMonoid = requires(typename M::value_type a, typename M::value_type b) {
    // 1. Must define `value_type`
    typename M::value_type;

    // 2. Must have a static method `id()` returning `value_type`
    { M::id() } -> std::same_as<typename M::value_type>;

    // 3. Must have a static method `op(a, b)` returning `value_type`
    { M::op(a, b) } -> std::same_as<typename M::value_type>;
};

// Concept for groups. A type satisfying this concept must also obey the group
// laws; concepts can check the interface but not the algebraic properties.
template <typename M>
concept IsGroup = IsMonoid<M> && requires(typename M::value_type a) {
    { M::inv(a) } -> std::same_as<typename M::value_type>;
};

// Concept for commutative groups. Commutativity is a semantic requirement and
// cannot be checked by a C++ concept.
template <typename M>
concept IsCommutativeGroup = IsGroup<M>;

}  // namespace monoid
}  // namespace m1une


#line 1 "monoid/power.hpp"



#line 5 "monoid/power.hpp"

namespace m1une {
namespace monoid {

// Computes a^n (a * a * ... * a, n times) for an element 'a' in Monoid 'M'.
// Uses binary exponentiation to achieve O(log n) time complexity.
// The template parameter 'M' is constrained by the 'IsMonoid' concept.
template <IsMonoid M>
constexpr typename M::value_type power(typename M::value_type a, long long n) {
    typename M::value_type res = M::id();
    while (n > 0) {
        if (n & 1) {
            res = M::op(res, a);
        }
        a = M::op(a, a);
        n >>= 1;
    }
    return res;
}

}  // namespace monoid
}  // namespace m1une


#line 8 "acted_monoid/range_update_range_product.hpp"

namespace m1une {
namespace acted_monoid {

template <m1une::monoid::IsMonoid Monoid>
struct RangeUpdateRangeProductNode {
    using base_type = typename Monoid::value_type;

    base_type product;
    long long size;
};

// Range assignment and range product for an arbitrary, possibly
// noncommutative, monoid.
template <m1une::monoid::IsMonoid Monoid>
struct RangeUpdateRangeProduct {
    using base_type = typename Monoid::value_type;
    using value_type = RangeUpdateRangeProductNode<Monoid>;
    using operator_type = std::optional<base_type>;
    static constexpr bool commutative = [] {
        if constexpr (requires { Monoid::commutative; }) {
            return bool(Monoid::commutative);
        } else {
            return false;
        }
    }();
    static constexpr bool operator_commutative = false;

    static constexpr value_type id() {
        return {Monoid::id(), 0};
    }

    static constexpr value_type op(const value_type& a, const value_type& b) {
        return {Monoid::op(a.product, b.product), a.size + b.size};
    }

    static constexpr operator_type op_id() {
        return std::nullopt;
    }

    static constexpr operator_type op_comp(const operator_type& f, const operator_type& g) {
        return f.has_value() ? f : g;
    }

    static constexpr value_type mapping(const operator_type& f, const value_type& x) {
        if (!f.has_value() || x.size == 0) return x;
        return {m1une::monoid::power<Monoid>(f.value(), x.size), x.size};
    }

    static constexpr value_type make(const base_type& value) {
        return {value, 1};
    }
};

}  // namespace acted_monoid
}  // namespace m1une


#line 1 "ds/segtree/lazy_segtree.hpp"



#include <bit>
#include <cassert>
#line 7 "ds/segtree/lazy_segtree.hpp"
#include <utility>
#include <vector>

#line 1 "acted_monoid/concept.hpp"



#line 5 "acted_monoid/concept.hpp"

namespace m1une {
namespace acted_monoid {

// Concept defining the requirements for an Acted Monoid.
template <typename AM>
concept IsActedMonoid = requires(typename AM::value_type a, typename AM::value_type b, typename AM::operator_type f,
                                 typename AM::operator_type g) {
    // 1. Value Monoid
    typename AM::value_type;
    { AM::id() } -> std::same_as<typename AM::value_type>;
    { AM::op(a, b) } -> std::same_as<typename AM::value_type>;

    // 2. Operator Monoid
    typename AM::operator_type;
    { AM::op_id() } -> std::same_as<typename AM::operator_type>;
    { AM::op_comp(f, g) } -> std::same_as<typename AM::operator_type>;  // Composition order: f(g(x))

    // 3. Mapping: Operator x Value -> Value
    { AM::mapping(f, a) } -> std::same_as<typename AM::value_type>;
};

// Concept for acted monoids whose value monoid is a commutative group.
// The value operation must obey commutativity and inverse laws.
template <typename AM>
concept IsCommutativeActedGroup = IsActedMonoid<AM> && requires(typename AM::value_type a) {
    { AM::inv(a) } -> std::same_as<typename AM::value_type>;
};

}  // namespace acted_monoid
}  // namespace m1une


#line 1 "math/bit_ceil.hpp"



namespace m1une {
namespace math {

template <typename T>
constexpr T bit_ceil(T n) {
    if (n <= 1) return 1;
    T x = 1;
    while (x < n) x <<= 1;
    return x;
}

}  // namespace math
}  // namespace m1une


#line 12 "ds/segtree/lazy_segtree.hpp"

namespace m1une {
namespace ds {

// A highly generic Lazy Segment Tree utilizing C++20 Concepts for type safety.
// It operates on any Acted Monoid structure satisfying the `m1une::acted_monoid::IsActedMonoid` concept.
template <m1une::acted_monoid::IsActedMonoid ActedMonoid>
struct LazySegtree {
    using T = typename ActedMonoid::value_type;
    using F = typename ActedMonoid::operator_type;

   private:
    int _n, _size, _log;
    std::vector<T> _d;
    std::vector<F> _lz;

    // Recalculates the value of the node k from its children.
    void update(int k) {
        _d[k] = ActedMonoid::op(_d[2 * k], _d[2 * k + 1]);
    }

    static T mapping_at(const F& f, const T& value, long long ord) {
        if constexpr (requires(F g, T x, long long i) { ActedMonoid::mapping(g, x, i); }) {
            return ActedMonoid::mapping(f, value, ord);
        } else {
            return ActedMonoid::mapping(f, value);
        }
    }

    static F shift_operator(const F& f, long long ord) {
        if constexpr (requires(F g, long long i) { ActedMonoid::op_shift(g, i); }) {
            return ActedMonoid::op_shift(f, ord);
        } else {
            return f;
        }
    }

    int node_length(int k) const {
        int level = std::bit_width((unsigned int)k) - 1;
        return _size >> level;
    }

    int node_left(int k) const {
        int level = std::bit_width((unsigned int)k) - 1;
        int len = _size >> level;
        return (k - (1 << level)) * len;
    }

    // Applies the operator f to the node k and updates its lazy tag if it's an internal node.
    void all_apply(int k, F f) {
        _d[k] = mapping_at(f, _d[k], 0);
        if (k < _size) {
            _lz[k] = ActedMonoid::op_comp(f, _lz[k]);
        }
    }

    // Propagates the lazy tag of the node k down to its children.
    void push(int k) {
        all_apply(2 * k, _lz[k]);
        all_apply(2 * k + 1, shift_operator(_lz[k], node_length(k) / 2));
        _lz[k] = ActedMonoid::op_id();
    }

   public:
    // Constructs an empty lazy segment tree.
    LazySegtree() : LazySegtree(0) {}

    // Constructs a lazy segment tree of size `n`, initialized with the identity element.
    explicit LazySegtree(int n) : LazySegtree(std::vector<T>(n, ActedMonoid::id())) {}

    // Constructs a lazy segment tree from an existing vector.
    explicit LazySegtree(const std::vector<T>& v) : _n(int(v.size())) {
        _size = m1une::math::bit_ceil((unsigned int)(_n));
        _log = 0;
        while ((1U << _log) < (unsigned int)(_size)) _log++;
        _d.assign(2 * _size, ActedMonoid::id());
        _lz.assign(_size, ActedMonoid::op_id());
        for (int i = 0; i < _n; i++) _d[_size + i] = v[i];
        for (int i = _size - 1; i >= 1; i--) update(i);
    }
    explicit LazySegtree(std::vector<T>&& v) : _n(int(v.size())) {
        _size = m1une::math::bit_ceil((unsigned int)(_n));
        _log = 0;
        while ((1U << _log) < (unsigned int)(_size)) _log++;
        _d.assign(2 * _size, ActedMonoid::id());
        _lz.assign(_size, ActedMonoid::op_id());
        for (int i = 0; i < _n; i++) _d[_size + i] = std::move(v[i]);
        for (int i = _size - 1; i >= 1; i--) update(i);
    }

    // Constructs a lazy segment tree from a vector of a different type U.
    // It automatically adapts to the Monoid's initialization requirements:
    // 1. ActedMonoid::make(val) if it exists.
    // 2. ActedMonoid::make(val, index) if the monoid requires global indices.
    // 3. static_cast<T>(val) as a fallback for simple monoids.
    template <typename U>
    requires (!std::same_as<U, T>) && (
        requires(U x) { ActedMonoid::make(x); } ||
        requires(U x, int i) { ActedMonoid::make(x, i); } ||
        std::convertible_to<U, T>
    )
    explicit LazySegtree(const std::vector<U>& v) : _n(int(v.size())) {
        _size = m1une::math::bit_ceil((unsigned int)(_n));
        _log = 0;
        while ((1U << _log) < (unsigned int)(_size)) _log++;
        _d.assign(2 * _size, ActedMonoid::id());
        _lz.assign(_size, ActedMonoid::op_id());
        for (int i = 0; i < _n; i++) {
            if constexpr (requires(U x) { ActedMonoid::make(x); }) {
                _d[_size + i] = ActedMonoid::make(v[i]);
            } else if constexpr (requires(U x, int idx) { ActedMonoid::make(x, idx); }) {
                _d[_size + i] = ActedMonoid::make(v[i], i);
            } else {
                _d[_size + i] = static_cast<T>(v[i]);
            }
        }
        for (int i = _size - 1; i >= 1; i--) update(i);
    }

    // Returns the number of elements.
    int size() const {
        return _n;
    }

    // Returns whether the tree is empty.
    bool empty() const {
        return _n == 0;
    }

    // Assigns x to the p-th element.
    void set(int p, T x) {
        assert(0 <= p && p < _n);
        p += _size;
        for (int i = _log; i >= 1; i--) push(p >> i);
        _d[p] = x;
        for (int i = 1; i <= _log; i++) update(p >> i);
    }

    // Returns the value of the p-th element.
    T get(int p) {
        assert(0 <= p && p < _n);
        p += _size;
        for (int i = _log; i >= 1; i--) push(p >> i);
        return _d[p];
    }

    // Returns the value of the p-th element.
    T operator[](int p) {
        return get(p);
    }

    // Returns the product (result of the monoid operation) in the range [l, r).
    T prod(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        if (l == r) return ActedMonoid::id();

        l += _size;
        r += _size;

        for (int i = _log; i >= 1; i--) {
            if (((l >> i) << i) != l) push(l >> i);
            if (((r >> i) << i) != r) push((r - 1) >> i);
        }

        T sml = ActedMonoid::id(), smr = ActedMonoid::id();
        while (l < r) {
            if (l & 1) sml = ActedMonoid::op(sml, _d[l++]);
            if (r & 1) smr = ActedMonoid::op(_d[--r], smr);
            l >>= 1;
            r >>= 1;
        }

        return ActedMonoid::op(sml, smr);
    }

    // Returns the product of the entire array.
    T all_prod() const {
        return _d[1];
    }

    // Returns all elements as a vector.
    std::vector<T> to_vector() {
        for (int k = 1; k < _size; k++) push(k);
        std::vector<T> res;
        res.reserve(_n);
        for (int i = 0; i < _n; i++) res.push_back(_d[_size + i]);
        return res;
    }

    // Returns the elements in the range [l, r) as a vector.
    std::vector<T> to_vector(int l, int r) {
        assert(0 <= l && l <= r && r <= _n);
        std::vector<T> res;
        res.reserve(r - l);
        for (int i = l; i < r; i++) res.push_back(get(i));
        return res;
    }

    // Applies the operator f to the p-th element.
    void apply(int p, F f) {
        assert(0 <= p && p < _n);
        p += _size;
        for (int i = _log; i >= 1; i--) push(p >> i);
        _d[p] = mapping_at(f, _d[p], 0);
        for (int i = 1; i <= _log; i++) update(p >> i);
    }

    // Applies the operator f to all elements in the range [l, r).
    void apply(int l, int r, F f) {
        assert(0 <= l && l <= r && r <= _n);
        if (l == r) return;

        int base_l = l;
        l += _size;
        r += _size;

        for (int i = _log; i >= 1; i--) {
            if (((l >> i) << i) != l) push(l >> i);
            if (((r >> i) << i) != r) push((r - 1) >> i);
        }

        {
            int l2 = l, r2 = r;
            while (l < r) {
                if (l & 1) {
                    all_apply(l, shift_operator(f, node_left(l) - base_l));
                    l++;
                }
                if (r & 1) {
                    --r;
                    all_apply(r, shift_operator(f, node_left(r) - base_l));
                }
                l >>= 1;
                r >>= 1;
            }
            l = l2;
            r = r2;
        }

        for (int i = 1; i <= _log; i++) {
            if (((l >> i) << i) != l) update(l >> i);
            if (((r >> i) << i) != r) update((r - 1) >> i);
        }
    }

    // Finds the largest r such that g(prod(l, r)) is true.
    template <class F_pred>
    int max_right(int l, F_pred g) {
        assert(0 <= l && l <= _n);
        assert(g(ActedMonoid::id()));
        if (l == _n) return _n;
        l += _size;
        for (int i = _log; i >= 1; i--) push(l >> i);
        T sm = ActedMonoid::id();
        do {
            while (l % 2 == 0) l >>= 1;
            if (!g(ActedMonoid::op(sm, _d[l]))) {
                while (l < _size) {
                    push(l);
                    l = (2 * l);
                    if (g(ActedMonoid::op(sm, _d[l]))) {
                        sm = ActedMonoid::op(sm, _d[l]);
                        l++;
                    }
                }
                return l - _size;
            }
            sm = ActedMonoid::op(sm, _d[l]);
            l++;
        } while ((l & -l) != l);
        return _n;
    }

    // Finds the smallest l such that g(prod(l, r)) is true.
    template <class F_pred>
    int min_left(int r, F_pred g) {
        assert(0 <= r && r <= _n);
        assert(g(ActedMonoid::id()));
        if (r == 0) return 0;
        r += _size;
        for (int i = _log; i >= 1; i--) push((r - 1) >> i);
        T sm = ActedMonoid::id();
        do {
            r--;
            while (r > 1 && (r % 2)) r >>= 1;
            if (!g(ActedMonoid::op(_d[r], sm))) {
                while (r < _size) {
                    push(r);
                    r = (2 * r + 1);
                    if (g(ActedMonoid::op(_d[r], sm))) {
                        sm = ActedMonoid::op(_d[r], sm);
                        r--;
                    }
                }
                return r + 1 - _size;
            }
            sm = ActedMonoid::op(_d[r], sm);
        } while ((r & -r) != r);
        return 0;
    }
};

}  // namespace ds
}  // namespace m1une


#line 5 "verify/ds/segtree/range_update_range_product.test.cpp"

#include <algorithm>
#line 8 "verify/ds/segtree/range_update_range_product.test.cpp"
#include <cstdint>
#line 11 "verify/ds/segtree/range_update_range_product.test.cpp"

#line 1 "math/modint.hpp"



#line 6 "math/modint.hpp"
#include <iostream>
#include <type_traits>
#line 9 "math/modint.hpp"

namespace m1une {
namespace math {

template <uint32_t Modulus>
struct ModInt {
    static_assert(0 < Modulus, "Modulus must be positive");

   private:
    uint32_t _v;

   public:
    static constexpr uint32_t mod() {
        return Modulus;
    }

    static constexpr ModInt raw(uint32_t v) noexcept {
        ModInt x;
        x._v = v;
        return x;
    }

    constexpr ModInt() noexcept : _v(0) {}

    template <class Integer, std::enable_if_t<std::is_integral_v<Integer>, int> = 0>
    constexpr ModInt(Integer v) noexcept {
        if constexpr (std::is_signed_v<Integer>) {
            int64_t x = static_cast<int64_t>(v) % static_cast<int64_t>(Modulus);
            if (x < 0) x += Modulus;
            _v = static_cast<uint32_t>(x);
        } else {
            _v = static_cast<uint32_t>(static_cast<uint64_t>(v) % Modulus);
        }
    }

    constexpr uint32_t val() const noexcept {
        return _v;
    }

    constexpr ModInt& operator++() noexcept {
        _v++;
        if (_v == Modulus) _v = 0;
        return *this;
    }

    constexpr ModInt& operator--() noexcept {
        if (_v == 0) _v = Modulus;
        _v--;
        return *this;
    }

    constexpr ModInt operator++(int) noexcept {
        ModInt res = *this;
        ++*this;
        return res;
    }

    constexpr ModInt operator--(int) noexcept {
        ModInt res = *this;
        --*this;
        return res;
    }

    constexpr ModInt& operator+=(const ModInt& rhs) noexcept {
        _v += rhs._v;
        if (_v >= Modulus) _v -= Modulus;
        return *this;
    }

    constexpr ModInt& operator-=(const ModInt& rhs) noexcept {
        _v -= rhs._v;
        if (_v >= Modulus) _v += Modulus;
        return *this;
    }

    constexpr ModInt& operator*=(const ModInt& rhs) noexcept {
        uint64_t z = _v;
        z *= rhs._v;
        _v = static_cast<uint32_t>(z % Modulus);
        return *this;
    }

    constexpr ModInt& operator/=(const ModInt& rhs) noexcept {
        return *this *= rhs.inv();
    }

    constexpr ModInt operator+(const ModInt& rhs) const noexcept {
        return ModInt(*this) += rhs;
    }
    constexpr ModInt operator-(const ModInt& rhs) const noexcept {
        return ModInt(*this) -= rhs;
    }
    constexpr ModInt operator*(const ModInt& rhs) const noexcept {
        return ModInt(*this) *= rhs;
    }
    constexpr ModInt operator/(const ModInt& rhs) const noexcept {
        return ModInt(*this) /= rhs;
    }

    constexpr bool operator==(const ModInt& rhs) const noexcept {
        return _v == rhs._v;
    }
    constexpr bool operator!=(const ModInt& rhs) const noexcept {
        return _v != rhs._v;
    }

    constexpr ModInt pow(long long n) const noexcept {
        ModInt res = raw(1 % Modulus);
        ModInt x = n < 0 ? inv() : *this;
        uint64_t exponent = n < 0 ? uint64_t(-(n + 1)) + 1 : uint64_t(n);
        while (exponent > 0) {
            if (exponent & 1) res *= x;
            x *= x;
            exponent >>= 1;
        }
        return res;
    }

    constexpr ModInt inv() const noexcept {
        int64_t a = _v, b = Modulus, u = 1, v = 0;
        while (b) {
            int64_t t = a / b;
            a -= t * b;
            std::swap(a, b);
            u -= t * v;
            std::swap(u, v);
        }
        assert(a == 1);
        u %= Modulus;
        if (u < 0) u += Modulus;
        return raw(static_cast<uint32_t>(u));
    }

    friend std::ostream& operator<<(std::ostream& os, const ModInt& rhs) {
        return os << rhs._v;
    }

    friend std::istream& operator>>(std::istream& is, ModInt& rhs) {
        long long v;
        is >> v;
        rhs = ModInt(v);
        return is;
    }
};

using modint998244353 = ModInt<998244353>;
using modint1000000007 = ModInt<1000000007>;

template <int Id = 0>
struct DynamicModInt {
   private:
    uint32_t _v;
    inline static uint32_t _mod = 1;

   public:
    static uint32_t mod() noexcept {
        return _mod;
    }

    static void set_mod(uint32_t modulus) noexcept {
        assert(modulus > 0);
        assert(modulus <= uint32_t(1) << 31);
        _mod = modulus;
    }

    static DynamicModInt raw(uint32_t v) noexcept {
        assert(v < _mod);
        DynamicModInt x;
        x._v = v;
        return x;
    }

    DynamicModInt() noexcept : _v(0) {}

    template <class Integer, std::enable_if_t<std::is_integral_v<Integer>, int> = 0>
    DynamicModInt(Integer v) noexcept {
        if constexpr (std::is_signed_v<Integer>) {
            int64_t x = static_cast<int64_t>(v) % static_cast<int64_t>(_mod);
            if (x < 0) x += _mod;
            _v = static_cast<uint32_t>(x);
        } else {
            _v = static_cast<uint32_t>(static_cast<uint64_t>(v) % _mod);
        }
    }

    uint32_t val() const noexcept {
        return _v;
    }

    DynamicModInt& operator++() noexcept {
        _v++;
        if (_v == _mod) _v = 0;
        return *this;
    }

    DynamicModInt& operator--() noexcept {
        if (_v == 0) _v = _mod;
        _v--;
        return *this;
    }

    DynamicModInt operator++(int) noexcept {
        DynamicModInt result = *this;
        ++*this;
        return result;
    }

    DynamicModInt operator--(int) noexcept {
        DynamicModInt result = *this;
        --*this;
        return result;
    }

    DynamicModInt& operator+=(const DynamicModInt& rhs) noexcept {
        _v += rhs._v;
        if (_v >= _mod) _v -= _mod;
        return *this;
    }

    DynamicModInt& operator-=(const DynamicModInt& rhs) noexcept {
        _v -= rhs._v;
        if (_v >= _mod) _v += _mod;
        return *this;
    }

    DynamicModInt& operator*=(const DynamicModInt& rhs) noexcept {
        _v = static_cast<uint32_t>(uint64_t(_v) * rhs._v % _mod);
        return *this;
    }

    DynamicModInt& operator/=(const DynamicModInt& rhs) noexcept {
        return *this *= rhs.inv();
    }

    DynamicModInt operator+(const DynamicModInt& rhs) const noexcept {
        return DynamicModInt(*this) += rhs;
    }

    DynamicModInt operator-(const DynamicModInt& rhs) const noexcept {
        return DynamicModInt(*this) -= rhs;
    }

    DynamicModInt operator*(const DynamicModInt& rhs) const noexcept {
        return DynamicModInt(*this) *= rhs;
    }

    DynamicModInt operator/(const DynamicModInt& rhs) const noexcept {
        return DynamicModInt(*this) /= rhs;
    }

    bool operator==(const DynamicModInt& rhs) const noexcept {
        return _v == rhs._v;
    }

    bool operator!=(const DynamicModInt& rhs) const noexcept {
        return _v != rhs._v;
    }

    DynamicModInt pow(long long exponent) const noexcept {
        DynamicModInt result = raw(1 % _mod);
        DynamicModInt base = exponent < 0 ? inv() : *this;
        uint64_t magnitude =
            exponent < 0 ? uint64_t(-(exponent + 1)) + 1 : uint64_t(exponent);
        while (magnitude > 0) {
            if (magnitude & 1) result *= base;
            base *= base;
            magnitude >>= 1;
        }
        return result;
    }

    DynamicModInt inv() const noexcept {
        int64_t a = _v, b = _mod, u = 1, v = 0;
        while (b) {
            int64_t quotient = a / b;
            a -= quotient * b;
            std::swap(a, b);
            u -= quotient * v;
            std::swap(u, v);
        }
        assert(a == 1);
        u %= _mod;
        if (u < 0) u += _mod;
        return raw(static_cast<uint32_t>(u));
    }

    friend std::ostream& operator<<(std::ostream& os, const DynamicModInt& rhs) {
        return os << rhs._v;
    }

    friend std::istream& operator>>(std::istream& is, DynamicModInt& rhs) {
        long long value;
        is >> value;
        rhs = DynamicModInt(value);
        return is;
    }
};

}  // namespace math
}  // namespace m1une


#line 1 "utilities/fast_io.hpp"



#line 5 "utilities/fast_io.hpp"
#include <array>
#include <cerrno>
#include <charconv>
#include <cstddef>
#include <cstdio>
#include <cstdlib>
#line 12 "utilities/fast_io.hpp"
#include <cstring>
#include <iterator>
#include <string>
#include <sys/stat.h>
#line 18 "utilities/fast_io.hpp"
#include <unistd.h>
#line 20 "utilities/fast_io.hpp"

namespace m1une {
namespace utilities {

struct FastOutput;

namespace internal {

// Shared with the convenience helpers in template.hpp.
inline FastOutput* standard_output_instance = nullptr;

// Detect std::begin(x), std::end(x).
template <class T, class = void>
struct is_range : std::false_type {};

template <class T>
struct is_range<T, std::void_t<
    decltype(std::begin(std::declval<T&>())),
    decltype(std::end(std::declval<T&>()))
>> : std::true_type {};

template <class T>
inline constexpr bool is_range_v = is_range<T>::value;

template <class T>
using range_reference_t = decltype(*std::begin(std::declval<T&>()));

template <class T>
using range_value_t = std::remove_cv_t<std::remove_reference_t<range_reference_t<T>>>;

template <class T, class = void>
struct range_stored_value {
    using type = range_value_t<T>;
};

template <class T>
struct range_stored_value<T, std::void_t<typename std::remove_cv_t<std::remove_reference_t<T>>::value_type>> {
    using type = typename std::remove_cv_t<std::remove_reference_t<T>>::value_type;
};

template <class T>
using range_stored_value_t = typename range_stored_value<T>::type;

// Treat strings and C strings as scalar output objects, not as ranges.
template <class T>
struct is_char_array : std::false_type {};

template <class T, std::size_t N>
struct is_char_array<T[N]>
    : std::bool_constant<std::is_same_v<std::remove_cv_t<T>, char>> {};

template <class T>
struct is_string_like
    : std::bool_constant<
          std::is_same_v<std::decay_t<T>, std::string>
          || std::is_same_v<std::decay_t<T>, const char*>
          || std::is_same_v<std::decay_t<T>, char*>
          || is_char_array<std::remove_reference_t<T>>::value
      > {};

template <class T>
inline constexpr bool is_string_like_v = is_string_like<T>::value;

// ModInt-like type: x.val() is printable, and x can be assigned from long long.
template <class T, class = void>
struct has_val_method : std::false_type {};

template <class T>
struct has_val_method<T, std::void_t<decltype(std::declval<const T&>().val())>>
    : std::true_type {};

template <class T>
inline constexpr bool has_val_method_v = has_val_method<T>::value;

template <class T, class = void>
struct has_static_mod_raw : std::false_type {};

template <class T>
struct has_static_mod_raw<
    T, std::void_t<decltype(T::mod()), decltype(T::raw(std::declval<uint32_t>()))>>
    : std::true_type {};

template <class T>
inline constexpr bool has_static_mod_raw_v = has_static_mod_raw<T>::value;

// libstdc++ before GCC 16 does not classify __int128 as an integral type in
// strict ISO modes such as -std=c++23. Keep the fast-I/O interface independent
// of that implementation detail.
template <class T>
inline constexpr bool is_integral_v =
    std::is_integral_v<T>
    || std::is_same_v<std::remove_cv_t<T>, __int128_t>
    || std::is_same_v<std::remove_cv_t<T>, __uint128_t>;

template <class T>
inline constexpr bool is_signed_v =
    std::is_signed_v<T>
    || std::is_same_v<std::remove_cv_t<T>, __int128_t>;

template <class T>
struct make_unsigned {
    using type = std::make_unsigned_t<T>;
};

template <>
struct make_unsigned<__int128_t> {
    using type = __uint128_t;
};

template <>
struct make_unsigned<__uint128_t> {
    using type = __uint128_t;
};

template <class T>
using make_unsigned_t = typename make_unsigned<std::remove_cv_t<T>>::type;

}  // namespace internal

struct FastInput {
    static constexpr int buffer_size = 1 << 20;

   private:
    std::FILE* _stream;
    char _buffer[buffer_size];
    int _position;
    int _length;
    int _file_descriptor;
    bool _streaming;

    bool refill() {
        _position = 0;
        if (_streaming) {
            ssize_t length;
            do {
                length = ::read(_file_descriptor, _buffer, buffer_size);
            } while (length < 0 && errno == EINTR);
            if (length <= 0) {
                _length = 0;
                return false;
            }
            _length = int(length);
        } else {
            _length = int(std::fread(_buffer, 1, buffer_size, _stream));
        }
        return _length != 0;
    }

    template <class T>
    bool read_integer_from_stream(T& value) {
        if (!skip_spaces()) return false;
        int c = read_char_raw();

        bool negative = false;
        if (c == '-') {
            negative = true;
            c = read_char_raw();
        }

        if constexpr (internal::is_signed_v<T>) {
            T result = 0;
            while ('0' <= c && c <= '9') {
                result = negative ? result * 10 - (c - '0')
                                  : result * 10 + (c - '0');
                c = read_char_raw();
            }
            value = result;
        } else {
            T result = 0;
            while ('0' <= c && c <= '9') {
                result = result * 10 + T(c - '0');
                c = read_char_raw();
            }
            value = negative ? T(0) - result : result;
        }
        return true;
    }

    bool prepare_number() {
        if (_length - _position >= 64) return true;
        const int remaining = _length - _position;
        if (remaining > 0) std::memmove(_buffer, _buffer + _position, remaining);
        const int added = int(std::fread(_buffer + remaining, 1, buffer_size - remaining, _stream));
        _position = 0;
        _length = remaining + added;
        if (_length < buffer_size) _buffer[_length] = '\0';
        return _length != 0;
    }

   public:
    explicit FastInput(std::FILE* stream = stdin)
        : _stream(stream),
          _position(0),
          _length(0),
          _file_descriptor(::fileno(stream)),
          _streaming([&] {
              struct stat status;
              return _file_descriptor >= 0
                     && ::fstat(_file_descriptor, &status) == 0
                     && !S_ISREG(status.st_mode);
          }()) {}

    FastInput(const FastInput&) = delete;
    FastInput& operator=(const FastInput&) = delete;

    int read_char_raw() {
        if (_position == _length && !refill()) return EOF;
        return _buffer[_position++];
    }

    bool skip_spaces() {
        int c = read_char_raw();
        while (c != EOF && c <= ' ') c = read_char_raw();
        if (c == EOF) return false;
        --_position;
        return true;
    }

    bool read(char& value) {
        if (!skip_spaces()) return false;
        value = char(read_char_raw());
        return true;
    }

    bool read(std::string& value) {
        if (!skip_spaces()) return false;
        value.clear();
        while (true) {
            const int begin = _position;
            while (_position < _length &&
                   static_cast<unsigned char>(_buffer[_position]) > ' ') {
                ++_position;
            }
            value.append(_buffer + begin, _position - begin);
            if (_position < _length) {
                ++_position;
                return true;
            }
            if (!refill()) return true;
        }
    }

    bool read(bool& value) {
        int x;
        if (!read(x)) return false;
        value = x != 0;
        return true;
    }

    template <class T>
    std::enable_if_t<
        internal::is_integral_v<T>
            && !std::is_same_v<std::remove_cv_t<T>, bool>
            && !std::is_same_v<std::remove_cv_t<T>, char>,
        bool
    >
    read(T& value) {
        if (_streaming) return read_integer_from_stream(value);
        if (!prepare_number()) return false;
        int c = static_cast<unsigned char>(_buffer[_position++]);
        while (c <= ' ') c = static_cast<unsigned char>(_buffer[_position++]);

        bool negative = false;
        if (c == '-') {
            negative = true;
            c = static_cast<unsigned char>(_buffer[_position++]);
        }

        if constexpr (internal::is_signed_v<T>) {
            T result = 0;
            while ('0' <= c && c <= '9') {
                const int first = c - '0';
                const int second = static_cast<unsigned char>(_buffer[_position]) - '0';
                if (0 <= second && second <= 9) {
                    result = negative ? result * 100 - (first * 10 + second)
                                      : result * 100 + (first * 10 + second);
                    ++_position;
                } else {
                    result = negative ? result * 10 - first : result * 10 + first;
                }
                c = static_cast<unsigned char>(_buffer[_position++]);
            }
            value = result;
        } else {
            T result = 0;
            while ('0' <= c && c <= '9') {
                const unsigned first = unsigned(c - '0');
                const int second = static_cast<unsigned char>(_buffer[_position]) - '0';
                if (0 <= second && second <= 9) {
                    result = result * 100 + T(first * 10 + unsigned(second));
                    ++_position;
                } else {
                    result = result * 10 + T(first);
                }
                c = static_cast<unsigned char>(_buffer[_position++]);
            }
            value = negative ? T(0) - result : result;
        }
        if (_position > _length) _position = _length;
        return true;
    }

    template <class T>
    std::enable_if_t<std::is_floating_point_v<T>, bool>
    read(T& value) {
        if (!skip_spaces()) return false;
        int c = read_char_raw();
        bool negative = false;
        if (c == '-' || c == '+') {
            negative = c == '-';
            c = read_char_raw();
        }

        long double result = 0;
        while ('0' <= c && c <= '9') {
            result = result * 10 + (c - '0');
            c = read_char_raw();
        }
        if (c == '.') {
            long double place = 0.1L;
            c = read_char_raw();
            while ('0' <= c && c <= '9') {
                result += (c - '0') * place;
                place *= 0.1L;
                c = read_char_raw();
            }
        }
        if (c == 'e' || c == 'E') {
            c = read_char_raw();
            bool exponent_negative = false;
            if (c == '-' || c == '+') {
                exponent_negative = c == '-';
                c = read_char_raw();
            }
            int exponent = 0;
            while ('0' <= c && c <= '9') {
                exponent = exponent * 10 + (c - '0');
                c = read_char_raw();
            }
            long double scale = 1;
            long double power = 10;
            while (exponent > 0) {
                if (exponent & 1) scale *= power;
                power *= power;
                exponent >>= 1;
            }
            result = exponent_negative ? result / scale : result * scale;
        }
        value = static_cast<T>(negative ? -result : result);
        return true;
    }

    template <class T>
    std::enable_if_t<
        internal::has_val_method_v<T>
            && !internal::is_integral_v<T>
            && !internal::is_range_v<T>,
        bool
    >
    read(T& value) {
        long long x;
        if (!read(x)) return false;
        if constexpr (internal::has_static_mod_raw_v<T>) {
            if (x >= 0 && uint64_t(x) < uint64_t(T::mod())) {
                value = T::raw(uint32_t(x));
            } else {
                value = T(x);
            }
        } else {
            value = T(x);
        }
        return true;
    }

    template <class First, class Second>
    bool read(std::pair<First, Second>& value) {
        if (!read(value.first)) return false;
        return read(value.second);
    }

    template <class Range>
    std::enable_if_t<
        internal::is_range_v<Range>
            && !internal::is_string_like_v<Range>,
        bool
    >
    read(Range& range) {
        using StoredValue = internal::range_stored_value_t<Range>;
        constexpr bool nested = internal::is_range_v<StoredValue>
                                && !internal::is_string_like_v<StoredValue>;

        for (auto&& value : range) {
            if constexpr (std::is_same_v<StoredValue, bool> && !nested) {
                bool x;
                if (!read(x)) return false;
                value = x;
            } else {
                if (!read(value)) return false;
            }
        }
        return true;
    }

    template <class First, class Second, class... Rest>
    bool read(First& first, Second& second, Rest&... rest) {
        if (!read(first)) return false;
        return read(second, rest...);
    }

    template <class T>
    FastInput& operator>>(T& value) {
        if (!read(value)) std::abort();
        return *this;
    }
};

struct FastOutput {
    static constexpr int buffer_size = 1 << 20;

   private:
    inline static const auto digit_quads = [] {
        std::array<char, 40000> result{};
        for (int i = 0; i < 10000; i++) {
            int value = i;
            for (int j = 3; j >= 0; j--) {
                result[4 * i + j] = char('0' + value % 10);
                value /= 10;
            }
        }
        return result;
    }();

    std::FILE* _stream;
    char _buffer[buffer_size];
    int _position;
    int _precision;
    std::chars_format _float_format;
    char _range_separator;
    std::string* _capture = nullptr;

    template <class T>
    std::string format_cell(const T& value) {
        std::string result;
        struct CaptureGuard {
            std::string*& target;
            std::string* previous;
            ~CaptureGuard() { target = previous; }
        } guard{_capture, _capture};
        _capture = &result;
        write(value);
        return result;
    }

    template <class Matrix>
    void write_aligned_matrix(const Matrix& matrix) {
        std::vector<std::vector<std::string>> rows;
        std::vector<std::size_t> widths;
        for (const auto& row : matrix) {
            auto& cells = rows.emplace_back();
            std::size_t column = 0;
            for (const auto& value : row) {
                cells.push_back(format_cell(value));
                if (column == widths.size()) widths.push_back(0);
                widths[column] = std::max(widths[column], cells.back().size());
                ++column;
            }
        }
        bool first = true;
        for (const auto& row : rows) {
            if (!first) write_char('\n');
            first = false;
            for (std::size_t column = 0; column < row.size(); ++column) {
                if (column != 0) write_char(_range_separator);
                for (std::size_t padding = row[column].size();
                     padding < widths[column]; ++padding) {
                    write_char(' ');
                }
                write(row[column]);
            }
        }
    }

   public:
    explicit FastOutput(std::FILE* stream = stdout)
        : _stream(stream),
          _position(0),
          _precision(6),
          _float_format(std::chars_format::general),
          _range_separator(' ') {
        if (_stream == stdout
            && internal::standard_output_instance == nullptr) {
            internal::standard_output_instance = this;
        }
    }

    FastOutput(const FastOutput&) = delete;
    FastOutput& operator=(const FastOutput&) = delete;

    ~FastOutput() {
        flush();
        if (internal::standard_output_instance == this) {
            internal::standard_output_instance = nullptr;
        }
    }

    void flush() {
        if (_position != 0) {
            std::fwrite(_buffer, 1, _position, _stream);
            _position = 0;
        }
        std::fflush(_stream);
    }

    void write_char(char c) {
        if (_capture != nullptr) {
            _capture->push_back(c);
            return;
        }
        if (_position == buffer_size) flush();
        _buffer[_position++] = c;
    }

    void write(const char* s) {
        while (*s != '\0') write_char(*s++);
    }

    void write(const std::string& s) {
        if (_capture != nullptr) {
            _capture->append(s);
            return;
        }
        std::size_t position = 0;
        while (position < s.size()) {
            if (_position == buffer_size) flush();
            const std::size_t copied =
                std::min<std::size_t>(buffer_size - _position, s.size() - position);
            std::memcpy(_buffer + _position, s.data() + position, copied);
            _position += int(copied);
            position += copied;
        }
    }

    void write(char c) {
        write_char(c);
    }

    void write(bool value) {
        write_char(value ? '1' : '0');
    }

    template <class T>
    std::enable_if_t<std::is_floating_point_v<T>>
    write(T value) {
        char digits[128];
        auto [end, error] = std::to_chars(
            digits,
            digits + sizeof(digits),
            value,
            _float_format,
            _precision
        );
        if (error != std::errc()) std::abort();
        for (const char* pointer = digits; pointer != end; pointer++) {
            write_char(*pointer);
        }
    }

    template <class T>
    std::enable_if_t<
        internal::is_integral_v<T>
            && !std::is_same_v<std::remove_cv_t<T>, bool>
            && !std::is_same_v<std::remove_cv_t<T>, char>
    >
    write(T value) {
        using Raw = std::remove_cv_t<T>;
        using Unsigned = internal::make_unsigned_t<Raw>;

        Unsigned magnitude;
        if constexpr (internal::is_signed_v<Raw>) {
            if (value < 0) {
                write_char('-');
                magnitude = Unsigned(0) - Unsigned(value);
            } else {
                magnitude = Unsigned(value);
            }
        } else {
            magnitude = value;
        }

        if (magnitude == 0) {
            write_char('0');
            return;
        }

        unsigned chunks[16];
        int count = 0;
        while (magnitude >= 10000) {
            const Unsigned quotient = magnitude / 10000;
            chunks[count++] = unsigned(magnitude - quotient * 10000);
            magnitude = quotient;
        }
        if (_capture == nullptr && _position > buffer_size - 64) flush();
        char captured[64];
        char* const begin = _capture != nullptr ? captured : _buffer + _position;
        char* destination = begin;
        const unsigned leading = unsigned(magnitude);
        const char* first = digit_quads.data() + 4 * leading;
        int skip = leading < 10 ? 3 : leading < 100 ? 2 : leading < 1000 ? 1 : 0;
        for (; skip < 4; skip++) *destination++ = first[skip];
        while (count--) {
            const char* digits = digit_quads.data() + 4 * chunks[count];
            std::memcpy(destination, digits, 4);
            destination += 4;
        }
        if (_capture != nullptr) {
            _capture->append(begin, destination - begin);
        } else {
            _position += int(destination - begin);
        }
    }

    template <class T>
    std::enable_if_t<
        internal::has_val_method_v<T>
            && !internal::is_integral_v<T>
            && !internal::is_range_v<T>
    >
    write(const T& value) {
        write(value.val());
    }

    template <class First, class Second>
    void write(const std::pair<First, Second>& value) {
        write(value.first);
        write_char(' ');
        write(value.second);
    }

    template <class Range>
    std::enable_if_t<
        internal::is_range_v<Range>
            && !internal::is_string_like_v<Range>
    >
    write(const Range& range) {
        using StoredValue = internal::range_stored_value_t<const Range>;
        constexpr bool nested = internal::is_range_v<StoredValue>
                                && !internal::is_string_like_v<StoredValue>;

        bool first = true;
        for (const auto& value : range) {
            if (!first) write_char(nested ? '\n' : _range_separator);
            first = false;
            if constexpr (std::is_same_v<StoredValue, bool> && !nested) {
                write(static_cast<bool>(value));
            } else {
                write(value);
            }
        }
    }

    template <class First, class... Rest>
    void print(const First& first, const Rest&... rest) {
        write(first);
        ((write_char(' '), write(rest)), ...);
    }

    void println() {
        write_char('\n');
    }

    void set_precision(int precision) {
        _precision = precision;
    }

    void set_fixed(int precision = 6) {
        _float_format = std::chars_format::fixed;
        _precision = precision;
    }

    void set_general(int precision = 6) {
        _float_format = std::chars_format::general;
        _precision = precision;
    }

    void set_range_separator(char separator) {
        _range_separator = separator;
    }

    template <class Matrix>
    void write_aligned(const Matrix& matrix) {
        using Row = internal::range_stored_value_t<const Matrix>;
        using Cell = internal::range_stored_value_t<const Row>;
        static_assert(internal::is_range_v<Row> && !internal::is_string_like_v<Row>,
                      "write_aligned requires a two-dimensional range");
        static_assert(!internal::is_range_v<Cell> || internal::is_string_like_v<Cell>,
                      "write_aligned requires scalar cells");
        write_aligned_matrix(matrix);
    }

    template <class Matrix>
    void println_aligned(const Matrix& matrix) {
        write_aligned(matrix);
        write_char('\n');
    }

    template <class... Args>
    void println(const Args&... args) {
        print(args...);
        write_char('\n');
    }

    template <class T>
    FastOutput& operator<<(const T& value) {
        write(value);
        return *this;
    }
};

}  // namespace utilities
}  // namespace m1une


#line 15 "verify/ds/segtree/range_update_range_product.test.cpp"

namespace {

using Mint = m1une::math::modint998244353;
using Function = std::pair<Mint, Mint>;

struct AffineComposition {
    using value_type = Function;

    static value_type id() {
        return {Mint(1), Mint(0)};
    }

    static value_type op(const value_type& left, const value_type& right) {
        return {
            right.first * left.first,
            right.first * left.second + right.second
        };
    }
};

using AM = m1une::acted_monoid::RangeUpdateRangeProduct<AffineComposition>;
static_assert(m1une::acted_monoid::IsActedMonoid<AM>);

Function naive_product(const std::vector<Function>& values, int left, int right) {
    Function result = AffineComposition::id();
    for (int i = left; i < right; i++) {
        result = AffineComposition::op(result, values[i]);
    }
    return result;
}

void test_randomized() {
    std::vector<Function> no_values;
    m1une::ds::LazySegtree<AM> empty(no_values);
    assert(empty.empty());
    assert(empty.prod(0, 0).product == AffineComposition::id());
    assert(empty.prod(0, 0).size == 0);

    std::uint64_t state = 20260716;
    auto random = [&state]() {
        state ^= state << 7;
        state ^= state >> 9;
        return state;
    };

    for (int trial = 0; trial < 120; trial++) {
        int size = 1 + int(random() % 25);
        std::vector<Function> values(size);
        for (Function& value : values) {
            value = Function{Mint(random() % 20), Mint(random() % 20)};
        }
        m1une::ds::LazySegtree<AM> seg(values);

        for (int operation = 0; operation < 200; operation++) {
            int left = int(random() % (size + 1));
            int right = int(random() % (size + 1));
            if (left > right) std::swap(left, right);

            if ((random() & 1U) == 0) {
                Function value = {Mint(random() % 20), Mint(random() % 20)};
                seg.apply(left, right, value);
                for (int i = left; i < right; i++) values[i] = value;
            } else {
                auto actual = seg.prod(left, right);
                assert(actual.product == naive_product(values, left, right));
                assert(actual.size == right - left);
            }

            auto all = seg.all_prod();
            assert(all.product == naive_product(values, 0, size));
            assert(all.size == size);
        }
    }
}

}  // namespace

int main() {
    m1une::utilities::FastInput fast_input;
    m1une::utilities::FastOutput fast_output;

    test_randomized();

    int n, q;
    fast_input >> n >> q;
    std::vector<Function> functions(n);
    for (Function& function : functions) {
        int a, b;
        fast_input >> a >> b;
        function = Function{Mint(a), Mint(b)};
    }

    m1une::ds::LazySegtree<AM> seg(functions);
    while (q--) {
        int type, left, right;
        fast_input >> type >> left >> right;
        if (type == 0) {
            int c, d;
            fast_input >> c >> d;
            seg.apply(left, right, Function{Mint(c), Mint(d)});
        } else {
            int x;
            fast_input >> x;
            Function function = seg.prod(left, right).product;
            fast_output << function.first * Mint(x) + function.second << '\n';
        }
    }
}

m1une's library

This documentation is automatically generated by online-judge-tools/verification-helper

verify/ds/segtree/range_update_range_product.test.cpp

Depends on

Code