test/yosupo/point_set_range_composite.test.cpp

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• Last update: 2024-01-07 20:09:47+09:00
• Problem: https://judge.yosupo.jp/problem/point_set_range_composite

Depends on

• Segment Tree (data-structure/segtree/segment_tree.hpp)
• Mod int (math/modint.hpp)

Code

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

#include <bits/stdc++.h>

#include "../../data-structure/segtree/segment_tree.hpp"
#include "../../math/modint.hpp"
using namespace std;
using ll = long long;

using mint = Modint<998244353>;

struct Monoid {
    using T = pair<mint, mint>;
    static T id() { return {1, 0}; }
    static T op(T a, T b) {
        return {a.first * b.first, a.second * b.first + b.second};
    }
};

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int N, Q;
    cin >> N >> Q;
    vector<pair<mint, mint>> ab(N);
    for (int i = 0; i < N; i++) {
        int a, b;
        cin >> a >> b;
        ab[i] = {a, b};
    }
    SegmentTree<Monoid> st(ab);
    for (int i = 0; i < Q; i++) {
        int t;
        cin >> t;
        if (t == 0) {
            int p, c, d;
            cin >> p >> c >> d;
            st.update(p, {c, d});
        } else {
            int l, r, x;
            cin >> l >> r >> x;
            auto f = st.fold(l, r);
            cout << f.first * x + f.second << "\n";
        }
    }
}

#line 1 "test/yosupo/point_set_range_composite.test.cpp"
#define PROBLEM "https://judge.yosupo.jp/problem/point_set_range_composite"

#include <bits/stdc++.h>

#line 3 "data-structure/segtree/segment_tree.hpp"
#include <bit>
#line 5 "data-structure/segtree/segment_tree.hpp"

template <typename M>
class SegmentTree {
    using T = M::T;

   public:
    SegmentTree() = default;
    explicit SegmentTree(int n) : SegmentTree(std::vector<T>(n, M::id())) {}
    explicit SegmentTree(const std::vector<T>& v)
        : size(std::bit_ceil(v.size())), node(2 * size, M::id()) {
        std::ranges::copy(v, node.begin() + size);
        for (int i = size - 1; i > 0; --i) {
            node[i] = M::op(node[2 * i], node[2 * i + 1]);
        }
    }

    T operator[](int k) const { return node[k + size]; }

    void update(int k, const T& x) {
        k += size;
        node[k] = x;
        while (k >>= 1) node[k] = M::op(node[2 * k], node[2 * k + 1]);
    }

    T fold(int l, int r) const {
        T vl = M::id(), vr = M::id();
        for (l += size, r += size; l < r; l >>= 1, r >>= 1) {
            if (l & 1) vl = M::op(vl, node[l++]);
            if (r & 1) vr = M::op(node[--r], vr);
        }
        return M::op(vl, vr);
    }

    template <typename F>
    int find_first(int l, F cond) const {
        T v = M::id();
        for (l += size; l > 0; l >>= 1) {
            if (l & 1) {
                T nv = M::op(v, node[l]);
                if (cond(nv)) {
                    while (l < size) {
                        nv = M::op(v, node[2 * l]);
                        if (cond(nv)) {
                            l = 2 * l;
                        } else {
                            v = nv, l = 2 * l + 1;
                        }
                    }
                    return l + 1 - size;
                }
                v = nv;
                ++l;
            }
        }
        return -1;
    }

    template <typename F>
    int find_last(int r, F cond) const {
        T v = M::id();
        for (r += size; r > 0; r >>= 1) {
            if (r & 1) {
                --r;
                T nv = M::op(node[r], v);
                if (cond(nv)) {
                    while (r < size) {
                        nv = M::op(node[2 * r + 1], v);
                        if (cond(nv)) {
                            r = 2 * r + 1;
                        } else {
                            v = nv, r = 2 * r;
                        }
                    }
                    return r - size;
                }
                v = nv;
            }
        }
        return -1;
    }

   private:
    int size;
    std::vector<T> node;
};
#line 4 "math/modint.hpp"

/**
 * @brief Mod int
 */
template <int m>
class Modint {
    using mint = Modint;
    static_assert(m > 0, "Modulus must be positive");

   public:
    static constexpr int mod() { return m; }

    constexpr Modint(long long y = 0) : x(y >= 0 ? y % m : (y % m + m) % m) {}

    constexpr int val() const { return x; }

    constexpr mint& operator+=(const mint& r) {
        if ((x += r.x) >= m) x -= m;
        return *this;
    }
    constexpr mint& operator-=(const mint& r) {
        if ((x += m - r.x) >= m) x -= m;
        return *this;
    }
    constexpr mint& operator*=(const mint& r) {
        x = static_cast<int>(1LL * x * r.x % m);
        return *this;
    }
    constexpr mint& operator/=(const mint& r) { return *this *= r.inv(); }

    constexpr bool operator==(const mint& r) const { return x == r.x; }

    constexpr mint operator+() const { return *this; }
    constexpr mint operator-() const { return mint(-x); }

    constexpr friend mint operator+(const mint& l, const mint& r) {
        return mint(l) += r;
    }
    constexpr friend mint operator-(const mint& l, const mint& r) {
        return mint(l) -= r;
    }
    constexpr friend mint operator*(const mint& l, const mint& r) {
        return mint(l) *= r;
    }
    constexpr friend mint operator/(const mint& l, const mint& r) {
        return mint(l) /= r;
    }

    constexpr mint inv() const {
        int a = x, b = m, u = 1, v = 0;
        while (b > 0) {
            int t = a / b;
            std::swap(a -= t * b, b);
            std::swap(u -= t * v, v);
        }
        return mint(u);
    }

    constexpr mint pow(long long n) const {
        mint ret(1), mul(x);
        while (n > 0) {
            if (n & 1) ret *= mul;
            mul *= mul;
            n >>= 1;
        }
        return ret;
    }

    friend std::ostream& operator<<(std::ostream& os, const mint& r) {
        return os << r.x;
    }

    friend std::istream& operator>>(std::istream& is, mint& r) {
        long long t;
        is >> t;
        r = mint(t);
        return is;
    }

   private:
    int x;
};
#line 7 "test/yosupo/point_set_range_composite.test.cpp"
using namespace std;
using ll = long long;

using mint = Modint<998244353>;

struct Monoid {
    using T = pair<mint, mint>;
    static T id() { return {1, 0}; }
    static T op(T a, T b) {
        return {a.first * b.first, a.second * b.first + b.second};
    }
};

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int N, Q;
    cin >> N >> Q;
    vector<pair<mint, mint>> ab(N);
    for (int i = 0; i < N; i++) {
        int a, b;
        cin >> a >> b;
        ab[i] = {a, b};
    }
    SegmentTree<Monoid> st(ab);
    for (int i = 0; i < Q; i++) {
        int t;
        cin >> t;
        if (t == 0) {
            int p, c, d;
            cin >> p >> c >> d;
            st.update(p, {c, d});
        } else {
            int l, r, x;
            cin >> l >> r >> x;
            auto f = st.fold(l, r);
            cout << f.first * x + f.second << "\n";
        }
    }
}

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