#include<iostream> #include<vector> #include<cstdio> using namespace std; int main() { int N, K, cnt = 0, result[10001]; string str; vector<int> data; cin >> N >> K; cin >> str; for(int i=0; i<N; i++){ if(str[i] == ')'){ result[i + 1] = data.back(); data.pop_back(); result[result[i + 1]] = i + 1; }else data.push_back(i + 1); } cout << result[K] << endl; return 0; }