Codeforces Round #504 (rated, Div. 1 + Div. 2, based on VK Cup 2018 Final)-C-Bracket Subsequence

#include<iostream>
#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;
char s[];
int main(){
  int k,n;
  int zk;
  int yk;
  while(~scanf("%d%d",&n,&k)){
    zk=;
    yk=;
    scanf("%s",s);
    int lens=strlen(s);
    for (int i=;i<lens;i++){
      if (s[i]=='(' && zk<k/){
            zk++;
       printf("(");
       }else if (s[i]==')' && yk<k/){
           yk++;
           printf(")");
       }
    }
    printf("\n");
  }
  return ;
}