func_code_string: #include <bits/stdc++.h>   using namespace std;   void err(istream_iterator<string> it) {}   template <typename T, typename... Args>   void err(istream_iterator<string> it, T a, Args... args) {     cout << *it <<   =   << a <<   n ;     err(++it, args...);   }   const int M = 1e9 + 7, N = 2e5 + 5;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     ;     long long t;     cin >> t;     while (t--) {       int n, m;       cin >> n >> m;       int a[n][m], b[n][m];       for (int i = 0; i < n; i++)         for (int j = 0; j < m; j++) cin >> a[i][j];       for (int i = 0; i < n; i++) {         for (int j = 0; j < m; j++) {           int c = 0;           if (i - 1 >= 0) c++;           if (i + 1 <= n - 1) c++;           if (j - 1 >= 0) c++;           if (j + 1 <= m - 1) c++;           b[i][j] = c;         }       }       bool red = false;       for (int i = 0; i < n; i++) {         for (int j = 0; j < m; j++) {           if (a[i][j] > b[i][j]) {             red = true;             break;           }         }         if (red) break;       }       if (red)         cout <<  NO               <<   n ;       else {         cout <<  YES               <<   n ;         for (int i = 0; i < n; i++)           for (int j = 0; j < m; j++) cout << b[i][j] <<    n [j == m - 1];         ;       }     }   }   