func_code_string: #include <bits/stdc++.h>   using namespace std;   bool isOk(string s) {     for (long long i = 0; i + 1 < s.size(); i++) {       if (s[i] ==  1  && s[i + 1] ==  1 ) {         return false;       }     }     return true;   }   int main() {     long long n;     cin >> n;     string s;     cin >> s;     if (!isOk(s)) {       puts( No );       return 0;     }     for (long long i = 0; i < n; i++) {       string tmp = s;       if (tmp[i] ==  0 ) {         tmp[i] =  1 ;         if (isOk(tmp)) {           puts( No );           return 0;         }       }     }     puts( Yes );     return 0;   }   