func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m, lamps[2002], sol = 0, cs;     memset(lamps, 0, sizeof(lamps));     cin >> n >> m;     string s[2002];     for (int i = 0; i < n; i++) {       cin >> s[i];     }     for (int i = 0; i < n; i++)       for (int j = 0; j < m; j++)         if (s[i][j] ==  1 ) lamps[j]++;     for (int i = 0; i < n; i++) {       cs = 1;       for (int j = 0; j < m; j++) {         if (s[i][j] ==  1  && lamps[j] < 2) {           cs = 0;           break;         }       }       if (cs == 1) {         sol = 1;         break;       }     }     if (sol)       cout <<  YES ;     else       cout <<  NO ;     return 0;   }   