#include <iostream>
#include <string>
#include <vector>

int main()
{
	int N; std::cin >> N;
	int K; std::cin >> K;
	std::string S; std::cin >> S;
	std::vector<int> pos(S.size());
	std::vector<std::pair<int, int> > vp;
	for(int i=0; i<pos.size(); i++) pos[i] = i+1;

	while(!S.empty())
	{
		int i = S.find("()");

		vp.push_back(std::pair<int, int>(pos[i],pos[i+1]));
		S.erase(S.begin()+i,S.begin()+i+2);
		pos.erase(pos.begin()+i,pos.begin()+i+2);
	}
	for(const auto &x : vp)
	{
		if(x.first==K) std::cout  << x.second;
		else if(x.second==K) std::cout << x.first;
	}
	std::cout  << std::endl;
	return 0;
}