modint/modint.hpp

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• Last update: 2023-10-31 00:16:57+09:00
• Include: #include "modint/modint.hpp"

Depends on

• modint/base.hpp

Required by

• Arbitrary Convolution (convolution/arbitrary_ntt.hpp)
• Convolution $\pmod{2^{64}}$ (convolution/convolution_mod_2_64.hpp)

Verified with

• test/aoj/aoj_2863.test.cpp
• test/aoj/aoj_3361.test.cpp
• test/convolution/Bitwise_And_Convolution.test.cpp
• test/convolution/Bitwise_OR_Convolution.test.cpp
• test/convolution/Bitwise_Xor_Convolution.test.cpp
• test/convolution/Convolution.test.cpp
• test/convolution/Convolution_Mod_1000000007.test.cpp
• test/convolution/Convolution_Mod_2_64.test.cpp
• test/convolution/Gcd_Convolution.test.cpp
• test/convolution/Lcm_Convolution.test.cpp
• test/convolution/Subset_Convolution.test.cpp
• test/data_structure/Deque_Operate_All_Composite.test.cpp
• test/data_structure/Dynamic_Sequence_Range_Affine_Range_Sum.test.cpp
• test/data_structure/Point_Set_Range_Composite.test.cpp
• test/data_structure/Queue_Operate_All_Composite.test.cpp
• test/data_structure/Range_Affine_Point_Get.test.cpp
• test/data_structure/Range_Affine_Point_Get_Dynamic_Segtree.test.cpp
• test/data_structure/Range_Affine_Range_Sum.test.cpp
• test/data_structure/Vertex_Set_Path_Compositie.test.cpp
• test/math/Berunoulli_Number.test.cpp
• test/math/Catalan_Convolution.test.cpp
• test/math/Kth_term_of_Linearly_Recurrent_Sequence.test.cpp
• test/math/Partition_Function_FPS.test.cpp
• test/math/Partition_Function_Pentagonal.test.cpp
• test/math/Stirling_Number_of_the_First_Kind.test.cpp
• test/math/Stirling_Number_of_the_Second_Kind.test.cpp
• test/math/Sum_of_Totient_Function.test.cpp
• test/math/sharp_p_subset_sum.test.cpp
• test/matrix/Determinant_of_Matrix.test.cpp
• test/matrix/Determinant_of_Matrix_2.test.cpp
• test/matrix/Inverse_Matrix.test.cpp
• test/matrix/Matrix_Product.test.cpp
• test/matrix/Pow_of_Matrix.test.cpp
• test/matrix/Rank_of_Matrix.test.cpp
• test/matrix/System_of_Linear_Equations.test.cpp
• test/polynomial/Composition_of_Formal_Power_Series.test.cpp
• test/polynomial/Compositional_Inverse_of_Formal_Power_Series.test.cpp
• test/polynomial/Division_of_Polynomials.test.cpp
• test/polynomial/Exp_of_Formal_Power_Series.test.cpp
• test/polynomial/Exp_of_Formal_Power_Series_Sparse.test.cpp
• test/polynomial/Inv_of_Formal_Power_Series.test.cpp
• test/polynomial/Inv_of_Formal_Power_Series_Sparse.test.cpp
• test/polynomial/Log_of_Formal_Power_Series.test.cpp
• test/polynomial/Log_of_Formal_Power_Series_Sparse.test.cpp
• test/polynomial/Multipoint_Evaluation.test.cpp
• test/polynomial/Polynomial_Interpolation.test.cpp
• test/polynomial/Polynomial_Taylor_Shift.test.cpp
• test/polynomial/Pow_of_Formal_Power_Series.test.cpp
• test/polynomial/Pow_of_Formal_Power_Series_Sparse.test.cpp
• test/polynomial/Product_of_Polynomial_Sequence.test.cpp
• test/polynomial/Sqrt_of_Formal_Power_Series.test.cpp
• test/polynomial/Sqrt_of_Formal_Power_Series_Sparse.test.cpp
• test/set_function/Exp_of_Set_Power_Series.test.cpp
• test/set_function/Polynomial_Composite_Set_Power_Series.test.cpp
• test/tree/Frequency_Table_of_Tree_Distance_MODE_0.test.cpp
• test/tree/Frequency_Table_of_Tree_Distance_MODE_1.test.cpp
• test/tree/Frequency_Table_of_Tree_Distance_MODE_2.test.cpp
• test/tree/Point_Set_Tree_Path_Composition_Sum_Fixed_Root.test.cpp
• test/tree/Tree_Path_Composite_Sum.test.cpp
• test/yuki/yuki_1145.test.cpp
• test/yuki/yuki_1302.test.cpp
• test/yuki/yuki_1796.test.cpp
• test/yuki/yuki_2747.test.cpp

Code

#pragma once

#include <cassert>

#include <iostream>


#include "base.hpp"


namespace ebi {

template <int m> struct static_modint {
  private:
    using modint = static_modint;

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

    static constexpr modint raw(int v) {
        modint x;
        x._v = v;
        return x;
    }

    constexpr static_modint() : _v(0) {}

    constexpr static_modint(long long v) {
        v %= (long long)umod();
        if (v < 0) v += (long long)umod();
        _v = (unsigned int)v;
    }

    constexpr unsigned int val() const {
        return _v;
    }

    constexpr unsigned int value() const {
        return val();
    }

    constexpr modint &operator++() {
        _v++;
        if (_v == umod()) _v = 0;
        return *this;
    }
    constexpr modint &operator--() {
        if (_v == 0) _v = umod();
        _v--;
        return *this;
    }

    constexpr modint operator++(int) {
        modint res = *this;
        ++*this;
        return res;
    }
    constexpr modint operator--(int) {
        modint res = *this;
        --*this;
        return res;
    }

    constexpr modint &operator+=(const modint &rhs) {
        _v += rhs._v;
        if (_v >= umod()) _v -= umod();
        return *this;
    }
    constexpr modint &operator-=(const modint &rhs) {
        _v -= rhs._v;
        if (_v >= umod()) _v += umod();
        return *this;
    }
    constexpr modint &operator*=(const modint &rhs) {
        unsigned long long x = _v;
        x *= rhs._v;
        _v = (unsigned int)(x % (unsigned long long)umod());
        return *this;
    }
    constexpr modint &operator/=(const modint &rhs) {
        return *this = *this * rhs.inv();
    }

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

    constexpr modint pow(long long n) const {
        assert(0 <= n);
        modint x = *this, res = 1;
        while (n) {
            if (n & 1) res *= x;
            x *= x;
            n >>= 1;
        }
        return res;
    }
    constexpr modint inv() const {
        assert(_v);
        return pow(umod() - 2);
    }

    friend modint operator+(const modint &lhs, const modint &rhs) {
        return modint(lhs) += rhs;
    }
    friend modint operator-(const modint &lhs, const modint &rhs) {
        return modint(lhs) -= rhs;
    }
    friend modint operator*(const modint &lhs, const modint &rhs) {
        return modint(lhs) *= rhs;
    }

    friend modint operator/(const modint &lhs, const modint &rhs) {
        return modint(lhs) /= rhs;
    }
    friend bool operator==(const modint &lhs, const modint &rhs) {
        return lhs.val() == rhs.val();
    }
    friend bool operator!=(const modint &lhs, const modint &rhs) {
        return !(lhs == rhs);
    }

  private:
    unsigned int _v = 0;

    static constexpr unsigned int umod() {
        return m;
    }
};

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

}  // namespace ebi

#line 2 "modint/modint.hpp"

#include <cassert>

#include <iostream>


#line 2 "modint/base.hpp"

#include <concepts>
#line 5 "modint/base.hpp"
#include <utility>

namespace ebi {

template <class T>
concept Modint = requires(T a, T b) {
    a + b;
    a - b;
    a * b;
    a / b;
    a.inv();
    a.val();
    a.pow(std::declval<long long>());
    T::mod();
};

template <Modint mint> std::istream &operator>>(std::istream &os, mint &a) {
    long long x;
    os >> x;
    a = x;
    return os;
}

template <Modint mint>
std::ostream &operator<<(std::ostream &os, const mint &a) {
    return os << a.val();
}

}  // namespace ebi
#line 7 "modint/modint.hpp"

namespace ebi {

template <int m> struct static_modint {
  private:
    using modint = static_modint;

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

    static constexpr modint raw(int v) {
        modint x;
        x._v = v;
        return x;
    }

    constexpr static_modint() : _v(0) {}

    constexpr static_modint(long long v) {
        v %= (long long)umod();
        if (v < 0) v += (long long)umod();
        _v = (unsigned int)v;
    }

    constexpr unsigned int val() const {
        return _v;
    }

    constexpr unsigned int value() const {
        return val();
    }

    constexpr modint &operator++() {
        _v++;
        if (_v == umod()) _v = 0;
        return *this;
    }
    constexpr modint &operator--() {
        if (_v == 0) _v = umod();
        _v--;
        return *this;
    }

    constexpr modint operator++(int) {
        modint res = *this;
        ++*this;
        return res;
    }
    constexpr modint operator--(int) {
        modint res = *this;
        --*this;
        return res;
    }

    constexpr modint &operator+=(const modint &rhs) {
        _v += rhs._v;
        if (_v >= umod()) _v -= umod();
        return *this;
    }
    constexpr modint &operator-=(const modint &rhs) {
        _v -= rhs._v;
        if (_v >= umod()) _v += umod();
        return *this;
    }
    constexpr modint &operator*=(const modint &rhs) {
        unsigned long long x = _v;
        x *= rhs._v;
        _v = (unsigned int)(x % (unsigned long long)umod());
        return *this;
    }
    constexpr modint &operator/=(const modint &rhs) {
        return *this = *this * rhs.inv();
    }

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

    constexpr modint pow(long long n) const {
        assert(0 <= n);
        modint x = *this, res = 1;
        while (n) {
            if (n & 1) res *= x;
            x *= x;
            n >>= 1;
        }
        return res;
    }
    constexpr modint inv() const {
        assert(_v);
        return pow(umod() - 2);
    }

    friend modint operator+(const modint &lhs, const modint &rhs) {
        return modint(lhs) += rhs;
    }
    friend modint operator-(const modint &lhs, const modint &rhs) {
        return modint(lhs) -= rhs;
    }
    friend modint operator*(const modint &lhs, const modint &rhs) {
        return modint(lhs) *= rhs;
    }

    friend modint operator/(const modint &lhs, const modint &rhs) {
        return modint(lhs) /= rhs;
    }
    friend bool operator==(const modint &lhs, const modint &rhs) {
        return lhs.val() == rhs.val();
    }
    friend bool operator!=(const modint &lhs, const modint &rhs) {
        return !(lhs == rhs);
    }

  private:
    unsigned int _v = 0;

    static constexpr unsigned int umod() {
        return m;
    }
};

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

}  // namespace ebi

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