func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:16000000 )   using namespace std;   long long mod = 998244353;   long double inf = 1e9;   long double eps = 1e-8;   long double pi = acos(-1);   ifstream in( input.txt );   ofstream out( output.txt );   int main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     int n, k;     cin >> n >> k;     string s;     cin >> s;     if (k == 0) {       cout << s;     } else {       if (s.size() == 1) {         cout << 0;         return 0;       }       if (s[0] !=  1 ) {         s[0] =  1 ;         k--;       }       for (int i = 1; i < n; i++) {         if (k == 0) break;         if (s[i] !=  0 ) {           s[i] =  0 ;           k--;         }       }       cout << s;     }     return 0;   }   