func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false), cin.tie(NULL), cout.tie(NULL);     int n, k;     cin >> n >> k;     string s;     cin >> s;     int c = 0;     if (k == 0)       cout << s << endl;     else if (n == 1) {       cout <<  0  << endl;     } else if (k >= 1 && n > 1) {       int x = s[0] -  0 ;       if (x > 1) {         s[0] =  1 ;         k--;       }       for (int i = 1; i < n && k > 0; i++) {         x = s[i] -  0 ;         if (x > 0) {           s[i] =  0 ;           k--;         }       }       cout << s << endl;     }   }   