結果
問題 | No.1340 おーじ君をさがせ |
ユーザー |
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提出日時 | 2021-03-21 13:41:37 |
言語 | C++14 (gcc 13.3.0 + boost 1.87.0) |
結果 |
TLE
|
実行時間 | - |
コード長 | 3,365 bytes |
コンパイル時間 | 797 ms |
コンパイル使用メモリ | 74,948 KB |
実行使用メモリ | 10,496 KB |
最終ジャッジ日時 | 2024-11-22 05:55:48 |
合計ジャッジ時間 | 55,562 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 48 TLE * 11 |
ソースコード
#include <iostream> #include <vector> using namespace std; using ll = long long int; template<typename T> class Matrix{ private: vector<vector<T>> mat; int row; int column; public: Matrix(int r = 1, int c = 1){ this->row = r; this->column = c; this->mat = vector<vector<T>>(this->row, vector<T>(this->column, 0)); } Matrix(vector<vector<T>> initmat){ this->mat = initmat; this->row = this->mat.size(); this->column = this->mat[0].size(); } vector<T> &operator[](const int rowind){ return mat[rowind]; } vector<T> operator[](const int rowind) const { return mat[rowind]; } const int getrow() const { return this->row; } const int getcol() const { return this->column; } Matrix operator+(const Matrix &other) const { if(this->row != other.getrow() || this->column != other.getcol()){ cerr << "Matrix calc error(add)" << endl; abort(); } Matrix ans(this->row, this->column); for(int i = 0; i < this->row; i++){ for(int j = 0; j < this->column; j++) ans[i][j] = this->mat[i][j] + other[i][j]; } return ans; } Matrix operator-(const Matrix &other) const { if(this->row != other.getrow() || this->column != other.getcol()){ cerr << "Matrix calc error(sub)" << endl; abort(); } Matrix ans(this->row, this->column); for(int i = 0; i < this->row; i++){ for(int j = 0; j < this->column; j++) ans[i][j] = this->mat[i][j] - other[i][j]; } return ans; } Matrix operator*(const Matrix &other) const { if(this->column != other.getrow()){ cerr << "Matrix calc error(mult)" << endl; abort(); } Matrix ans(this->row, other.getcol()); for(int i = 0; i < this->row; i++){ for(int j = 0; j < other.getcol(); j++){ for(int k = 0; k < this->column; k++) ans[i][j] += this->mat[i][k] * other[k][j]; } } return ans; } }; template<typename T> Matrix<T> modpow(Matrix<T> a, ll x, ll mod){ if(a.getrow() != a.getcol()){ cerr << "Matrix calc error(pow)" << endl; abort(); } Matrix<T> ans(a.getrow(), a.getcol()); for(int i = 0; i < ans.getrow(); i++) ans[i][i] = 1; auto modmult = [](const Matrix<T> &a, const Matrix<T> &b, const ll mod){ Matrix<T> res(a.getrow(), b.getcol()); for(int i = 0; i < a.getrow(); i++){ for(int j = 0; j < b.getcol(); j++){ for(int k = 0; k < a.getcol(); k++){ res[i][j] += a[i][k] * b[k][j]; } if(res[i][j] > 0) res[i][j] = 1; } } return res; }; while(x > 0){ if(x & 1){ ans = modmult(ans, a, mod); } a = modmult(a, a, mod); x >>= 1; } return ans; } int main(){ ll n, m, t; cin >> n >> m >> t; Matrix<int> mat(n, n); for(int i = 0; i < m; i++){ int a, b; cin >> a >> b; mat[a][b] = 1; } mat = modpow(mat, t, 1000000007); int ans = 0; for(int i = 0; i < n; i++){ ans += mat[0][i]; } cout << ans << endl; return 0; }