func_code_string: #include <bits/stdc++.h>   using namespace std;   const long double PI = atan(1.0) * 4.0;   const long long int MOD = 1e9 + 7;   const long long int INF = 1e18;   const long double EPS = 0.0000001;   int main() {     ios_base::sync_with_stdio(false), cin.tie(NULL);     int n, k;     cin >> n >> k;     string s;     cin >> s;     map<char, int> a;     for (int i = 0; i < n; i++) a[s[i]]++;     int j = 97;     while (k != 0 && j <= 122) {       for (int i = 0; i < n; i++) {         if (s[i] == char(j)) {           s[i] =  * ;           k--;           if (k == 0) break;         }       }       j++;     }     for (int i = 0; i < n; i++) {       if (s[i] !=  * ) cout << s[i];     }     return 0;   }   