modint
(Utility/modint.hpp)

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• Last update: 2024-12-03 09:45:24+09:00
• Include: #include "Utility/modint.hpp"

Required by

• 彩色数 (Graph/Chromatic_Number.hpp)
• example/matrix.example.cpp

Verified with

• verify/Chromatic_Number.test.cpp
• verify/Convolution_lcm_convolution.test.cpp
• verify/Datastructure_compress.test.cpp
• verify/Datastructure_dynamicseg.test.cpp
• verify/Datastructure_lazysegtree.test.cpp
• verify/Datastructure_seg_prod.test.cpp
• verify/Datastructure_swag.test.cpp
• verify/Datastructure_swag_more.test.cpp
• verify/Datastructure_treap.test.cpp
• verify/Math_combination_more.test.cpp
• verify/Math_matrix_det.test.cpp
• verify/Math_matrix_inv.test.cpp
• verify/Math_matrix_pow.test.cpp
• verify/Math_matrix_rank.test.cpp
• verify/bellman_ford.test.cpp
• verify/bitwise_and_convolution.test.cpp
• verify/dijkstra.test.cpp
• verify/mat_det.test.cpp
• verify/matrix.test.cpp
• verify/superset_transform.test.cpp
• verify/treedp.test.cpp
• 砂場/swag.test.cpp

Code

// 動的mod : template<int mod> を消して、上の方で変数modを宣言
template <uint32_t mod> struct modint {
    using mm = modint;
    uint32_t x;
    modint() : x(0) {}
    TT modint(T a = 0) : x((ll(a) % mod + mod)) {
        if (x >= mod) x -= mod;
    }

    friend mm operator+(mm a, mm b) {
        a.x += b.x;
        if (a.x >= mod) a.x -= mod;
        return a;
    }
    friend mm operator-(mm a, mm b) {
        a.x -= b.x;
        if (a.x >= mod) a.x += mod;
        return a;
    }

    mm operator-() const { return mod - x; }

    //+と-だけで十分な場合、以下は省略して良いです。

    friend mm operator*(mm a, mm b) { return (uint64_t)(a.x) * b.x; }
    friend mm operator/(mm a, mm b) { return a * b.inv(); }
    friend mm &operator+=(mm &a, mm b) { return a = a + b; }
    friend mm &operator-=(mm &a, mm b) { return a = a - b; }
    friend mm &operator*=(mm &a, mm b) { return a = a * b; }
    friend mm &operator/=(mm &a, mm b) { return a = a * b.inv(); }

    mm inv() const {
        assert(x != 0);
        return pow(mod - 2);
    }
    mm pow(ll y) const {
        mm res = 1;
        mm v = *this;
        while (y) {
            if (y & 1) res *= v;
            v *= v;
            y /= 2;
        }
        return res;
    }

    friend istream &operator>>(istream &is, mm &a) {
        ll t;
        cin >> t;
        a = mm(t);
        return is;
    }

    friend ostream &operator<<(ostream &os, mm a) { return os << a.x; }

    bool operator==(mm a) { return x == a.x; }
    bool operator!=(mm a) { return x != a.x; }

    bool operator<(const mm &a) const { return x < a.x; }
};
using modint998244353 = modint<998244353>;
using modint1000000007 = modint<1'000'000'007>;
/*
@brief modint
*/

#line 1 "Utility/modint.hpp"

// 動的mod : template<int mod> を消して、上の方で変数modを宣言
template <uint32_t mod> struct modint {
    using mm = modint;
    uint32_t x;
    modint() : x(0) {}
    TT modint(T a = 0) : x((ll(a) % mod + mod)) {
        if (x >= mod) x -= mod;
    }

    friend mm operator+(mm a, mm b) {
        a.x += b.x;
        if (a.x >= mod) a.x -= mod;
        return a;
    }
    friend mm operator-(mm a, mm b) {
        a.x -= b.x;
        if (a.x >= mod) a.x += mod;
        return a;
    }

    mm operator-() const { return mod - x; }

    //+と-だけで十分な場合、以下は省略して良いです。

    friend mm operator*(mm a, mm b) { return (uint64_t)(a.x) * b.x; }
    friend mm operator/(mm a, mm b) { return a * b.inv(); }
    friend mm &operator+=(mm &a, mm b) { return a = a + b; }
    friend mm &operator-=(mm &a, mm b) { return a = a - b; }
    friend mm &operator*=(mm &a, mm b) { return a = a * b; }
    friend mm &operator/=(mm &a, mm b) { return a = a * b.inv(); }

    mm inv() const {
        assert(x != 0);
        return pow(mod - 2);
    }
    mm pow(ll y) const {
        mm res = 1;
        mm v = *this;
        while (y) {
            if (y & 1) res *= v;
            v *= v;
            y /= 2;
        }
        return res;
    }

    friend istream &operator>>(istream &is, mm &a) {
        ll t;
        cin >> t;
        a = mm(t);
        return is;
    }

    friend ostream &operator<<(ostream &os, mm a) { return os << a.x; }

    bool operator==(mm a) { return x == a.x; }
    bool operator!=(mm a) { return x != a.x; }

    bool operator<(const mm &a) const { return x < a.x; }
};
using modint998244353 = modint<998244353>;
using modint1000000007 = modint<1'000'000'007>;
/*
@brief modint
*/

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