func_code_string: #include <bits/stdc++.h>   using namespace std;   const int mxn = 2e5 + 5;   long long a[1001][1001];   int main() {     int t;     cin >> t;     while (t--) {       int n, m;       cin >> n >> m;       for (int i = 1; i <= n; ++i) {         for (int j = 1; j <= m; ++j) {           cin >> a[i][j];           if ((i + j) & 1 && !(a[i][j] & 1))             ++a[i][j];           else if (!((i + j) & 1) && a[i][j] & 1)             ++a[i][j];           cout << a[i][j] <<    ;         }         cout << endl;       }     }   }   