func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     char s[101];     int n;     cin >> n;     cin >> s;     if (n == 1 && s[0] ==  0 ) {       cout << 0;       return 0;     }     cout << 1;     for (int i = 0; i < n; i++)       if (s[i] ==  0 ) cout << 0;     return 0;   }   