func_code_string: #include <bits/stdc++.h>   using namespace std;   const int max_n = 22, max_q = 11111, mod = 1000000007;   struct matrix {     vector<vector<int> > v;     matrix() {}     matrix(int n, int m) { v.resize(n, vector<int>(m, 0)); }     matrix operator*(const matrix &m) const {       matrix res(v.size(), m.v[0].size());       for (int i = 0; i < res.v.size(); ++i) {         for (int j = 0; j < res.v[i].size(); ++j) {           for (int k = 0; k < v[i].size(); ++k) {             res.v[i][j] += (1LL * v[i][k] * m.v[k][j]) % mod;             res.v[i][j] %= mod;           }         }       }       return res;     }   };   matrix power(matrix a, int b) {     if (b == 0) {       matrix res(a.v.size(), a.v.size());       for (int i = 0; i < res.v.size(); ++i) {         res.v[i][i] = 1;       }       return res;     }     if (b % 2 == 0) {       return power(a * a, b / 2);     }     return a * power(a, b - 1);   }   const int dx[] = {-1, 1, 0, 0, 0};   const int dy[] = {0, 0, -1, 1, 0};   int n, m, q, tp[max_q], x[max_q], y[max_q], t[max_q], f[max_q], a[max_n][max_n];   matrix dp, p;   bool is_in(int x, int y) { return 0 <= x && 0 <= y && x < n && y < m; }   void get_p() {     for (int i = 0; i < n; ++i) {       for (int j = 0; j < m; ++j) {         for (int k = 0; k < 5; ++k) {           int x = i + dx[k];           int y = j + dy[k];           if (is_in(x, y)) {             p.v[i * m + j][x * m + y] = 0;             if (a[x][y] == 0) {               p.v[i * m + j][x * m + y] = 1;             }           }         }       }     }   }   int main() {     scanf( %d%d%d , &n, &m, &q);     for (int i = 0; i < q; ++i) {       scanf( %d%d%d%d , &tp[i], &x[i], &y[i], &t[i]);       --x[i];       --y[i];       if (tp[i] == 3) {         ++t[i];       }     }     dp = matrix(1, n * m);     p = matrix(n * m, n * m);     get_p();     dp.v[0][0] = 1;     int nt = 1;     for (int i = 0; i < q; ++i) {       if (t[i] != nt) {         dp = dp * power(p, t[i] - nt - 1);       }       while (i + 1 < q && t[i] == t[i + 1]) {         if (tp[i] == 2) {           a[x[i]][y[i]] = 1;         }         if (tp[i] == 3) {           a[x[i]][y[i]] = 0;         }         ++i;       }       if (tp[i] == 2) {         a[x[i]][y[i]] = 1;       }       if (tp[i] == 3) {         a[x[i]][y[i]] = 0;       }       get_p();       if (t[i] != nt) {         dp = dp * p;       }       nt = t[i];       if (tp[i] == 1) {         printf( %d n , dp.v[0][x[i] * m + y[i]]);       }     }     return 0;   }   