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#define PROBLEM "https://judge.yosupo.jp/problem/matrix_det" #include <iostream> #include "../../matrix/square_matrix.hpp" #include "../../modint/modint.hpp" using Matrix = ebi::square_matrix<ebi::modint998244353, 0>; int main() { int n; std::cin >> n; Matrix::set_size(n); Matrix a; for (int i = 0; i < n; ++i) { for (int j = 0; j < n; ++j) { int val; std::cin >> val; a[i][j] = val; } } std::cout << a.det().val() << std::endl; }
#line 1 "test/matrix/Determinant_of_Matrix.test.cpp" #define PROBLEM "https://judge.yosupo.jp/problem/matrix_det" #include <iostream> #line 2 "matrix/square_matrix.hpp" #line 4 "matrix/square_matrix.hpp" #include <vector> namespace ebi { template <class Field, int id> struct square_matrix { private: using Self = square_matrix<Field, id>; public: square_matrix(Field val = 0) : mat(std::vector(N, std::vector<Field>(N, val))) {} Self operator+(Self &rhs) const noexcept { return Self(*this) += rhs; } Self operator-(Self &rhs) const noexcept { return Self(*this) -= rhs; } Self operator*(Self &rhs) const noexcept { return Self(*this) *= rhs; } Self &operator+=(Self &rhs) noexcept { for (int i = 0; i < N; ++i) { for (int j = 0; j < N; ++j) { mat[i][j] += rhs[i][j]; } } return *this; } Self &operator-=(Self &rhs) noexcept { for (int i = 0; i < N; ++i) { for (int j = 0; j < N; ++j) { mat[i][j] -= rhs[i][j]; } } return *this; } Self &operator*=(Self &rhs) noexcept { Self ret; for (int i = 0; i < N; ++i) { for (int k = 0; k < N; ++k) { for (int j = 0; j < N; ++j) { ret[i][j] += mat[i][k] * rhs[k][j]; } } } return *this = ret; } Self pow(long long n) const { Self res; for (int i = 0; i < N; ++i) { res[i][i] = 1; } Self x = *this; while (n > 0) { if (n & 1) res *= x; x *= x; n >>= 1; } return res; } Field det() const { Self res = *this; Field d = 1; for (int i = 0; i < N; ++i) { if (res[i][i] == 0) { int flag = -1; for (int j = i + 1; j < N; ++j) { if (res[j][i] != 0) { flag = j; break; } } if (flag < 0) { return 0; } std::swap(res[i], res[flag]); d = -d; } Field inv = res[i][i].inv(); for (int j = i + 1; j < N; ++j) { Field fac = res[j][i] * inv; for (int k = i; k < N; ++k) { res[j][k] -= fac * res[i][k]; } } d *= res[i][i]; } return d; } static Self identity() { Self res; for (int i = 0; i < N; ++i) { res[i][i] = 1; } return res; } std::vector<Field> &operator[](int i) { return mat[i]; } const std::vector<Field> &operator[](int i) const { return mat[i]; } static void set_size(int n) { N = n; } int size() const { return N; } private: std::vector<std::vector<Field>> mat; static int N; }; template <class Field, int id> int square_matrix<Field, id>::N = 0; template <class Field, int id> std::istream &operator>>(std::istream &os, square_matrix<Field, id> &a) { int n = a.size(); for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { os >> a[i][j]; } } return os; } template <class Field, int id> std::ostream &operator<<(std::ostream &os, const square_matrix<Field, id> &a) { int n = a.size(); for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { os << a[i][j]; if (j < n - 1) os << ' '; } if (i < n - 1) os << '\n'; } return os; } } // namespace ebi #line 2 "modint/modint.hpp" #include <cassert> #line 5 "modint/modint.hpp" #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 #line 7 "test/matrix/Determinant_of_Matrix.test.cpp" using Matrix = ebi::square_matrix<ebi::modint998244353, 0>; int main() { int n; std::cin >> n; Matrix::set_size(n); Matrix a; for (int i = 0; i < n; ++i) { for (int j = 0; j < n; ++j) { int val; std::cin >> val; a[i][j] = val; } } std::cout << a.det().val() << std::endl; }