func_code_string: #include <bits/stdc++.h>   using namespace std;   int trees(vector<vector<int> >& v, int a, int b, int y, int x) {     int trees = 0;     for (int i = y; i < (y + a); ++i) {       for (int j = x; j < (x + b); ++j) {         trees += v[i][j];       }     }     return trees;   }   int main() {     int n, m;     cin >> n >> m;     vector<vector<int> > v(n);     int totTree = 0;     for (int i = 0; i < n; ++i) {       for (int j = 0; j < m; ++j) {         int tmp;         cin >> tmp;         v[i].push_back(tmp);         totTree += tmp;       }     }     int a, b;     cin >> a >> b;     int minTree = totTree;     for (int i = 0; i + a - 1 < n; ++i) {       for (int j = 0; j + b - 1 < m; ++j) {         const int tr = trees(v, a, b, i, j);         if (tr < minTree) {           minTree = tr;         }       }     }     for (int i = 0; i + b - 1 < n; ++i) {       for (int j = 0; j + a - 1 < m; ++j) {         const int tr = trees(v, b, a, i, j);         if (tr < minTree) {           minTree = tr;         }       }     }     cout << minTree << endl;     return 0;   }   