func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int r, c;     cin >> r >> c;     if (r == c and r == 1) return cout << 0, 0;     if (r == 1) {       for (int i = 0; i < c; i++) cout << 2 + i <<    ;       return 0;     }     if (c == 1) {       for (int i = 0; i < r; i++) cout << 2 + i <<    ;       return 0;     }     int ans[r][c];     for (int i = 0; i < r; i++)       for (int j = 0; j < c; j++) ans[i][j] = 1;     int val = r + c;     for (int i = 0; i < r; i++) {       for (int j = 0; j < c; j++) ans[i][j] = val;       val--;     }     for (int j = 0; j < c; j++) {       for (int i = 0; i < r; i++) {         ans[i][j] = ans[i][j] * val;       }       val--;     }     for (int i = 0; i < r; i++) {       for (int j = 0; j < c; j++) cout << ans[i][j] <<    ;       cout << endl;     }     return 0;   }   