1 #include <iostream>
2 #include <unordered_map>
3 #include <algorithm>
4 #include <vector>
5 #include <queue>
6
7 using namespace std;
8
9 int main()
10 {
11 int n,k;
12 while(cin >> n >> k)
13 {
14 string input;
15 cin >> input;
16 string result;
17 int right_existed = 0;
18 int left = 0;
19 int right = 0;
20 for(int i = 0; i < n; i ++)
21 {
22 if(right_existed!=k/2)
23 {
24 result += input[i];
25 if(input[i]=='(')
26 {
27 right_existed ++;
28 left ++;
29 }
30 else
31 right ++;
32 }
33 }
34 int tmp = left - right;
35 while(tmp--)
36 result += ')';
37 cout << result << endl;
38 }
39 return 0;
40 }
