func_code_string: #include <bits/stdc++.h>   using namespace std;   const int m = 1000000007;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n, k;     cin >> n >> k;     string s;     cin >> s;     for (int i = 0; i <= 25; i++) {       for (int j = 0; j < n and k > 0; j++) {         if (s[j] ==  a  + i) {           k--;           s[j] =  0 ;         }       }     }     for (auto &x : s) {       if (x !=  0 ) {         cout << x;       }     }   }   