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