#include <iostream>
#include <vector>

int main() {
    using namespace std;
    int n, k;
    string s;
    cin >> n >> k >> s;
    vector<int> stk;
    for (int i = 0; i < n; i++) {
        if (s[i] == '(') {
            stk.push_back(i + 1);
        } else {
            if (i == k - 1) { cout << stk.back() << endl; }
            if (stk.back() == k) { cout << i + 1 << endl; }
            stk.pop_back();
        }
    }
}