#include <iostream>
#include <random>
#include <chrono>
#include <iomanip>
#include <set>
#include <map>
#include <queue>
#include <deque>
#include <string>
#include <stack>
#include <ranges>
#include <algorithm>
#include <vector>
using namespace std;
using ll=long long;

#include <atcoder/all>
using mint=atcoder::modint998244353;

ostream& operator<<(ostream& os,const mint& x){
	os<<x.val();
	return os;
}
istream& operator>>(istream& is,mint& x){
	int t;
	is>>t;
	x=t;
	return is;
}

template <typename S,typename T>
ostream& operator<<(ostream& os,const pair<S,T>& p);
template <typename S,typename T>
istream& operator>>(istream& is,pair<S,T>& p);
template <typename T,size_t n>
ostream& operator<<(ostream& os,const array<T,n>& arr);
template <typename T,size_t n>
istream& operator>>(istream& is,array<T,n>& arr);
template <typename T>
ostream& operator<<(ostream& os,const vector<T>& vec);
template <typename T>
istream& operator>>(istream& is,vector<T>& vec);

template <typename S,typename T>
ostream& operator<<(ostream& os,const pair<S,T>& p){
	os<<p.first<<" "<<p.second;
	return os;
}
template <typename S,typename T>
istream& operator>>(istream& is,pair<S,T>& p){
	is>>p.first>>p.second;
	return is;
}

template <typename T,size_t n>
ostream& operator<<(ostream& os,const array<T,n>& arr){
	for(int i=0;i<n;i++)os<<arr[i]<<(i+1==n?"":" ");
	return os;
}
template <typename T,size_t n>
istream& operator>>(istream& is,array<T,n>& arr){
	for(int i=0;i<n;i++)is>>arr[i];
	return is;
}
template <typename T>
ostream& operator<<(ostream& os,const vector<T>& vec){
	for(int i=0;i<vec.size();i++)os<<vec[i]<<(i+1==vec.size()?"":" ");
	return os;
}
template <typename T>
istream& operator>>(istream& is,vector<T>& vec){
	for(int i=0;i<vec.size();i++)is>>vec[i];
	return is;
}

template<class... Vecs>
void input_vec(Vecs&... vs) {
    const auto n = get<0>(tie(vs...)).size();

    for (size_t i = 0; i < n; ++i)
        ((cin >> vs[i]), ...);
}

template <typename T>
vector<T> make_unique(vector<T> vec){
	ranges::sort(vec);
	vec.erase(unique(vec.begin(),vec.end()),vec.end());
	return vec;
}

template <typename T, typename Comp = ranges::less, typename Proj = identity>
pair<vector<int>,vector<int>> make_rank(const vector<T>& vec, Comp comp = {}, Proj proj = {}) {
    int n = vec.size();
    vector<int> argsort(n);
    iota(argsort.begin(), argsort.end(), 0);

    ranges::stable_sort(argsort, comp, [&](int i) -> decltype(auto) {
        return invoke(proj, vec[i]);
    });

	vector<int> rank(n);
	for(int i=0;i<n;i++)rank[argsort[i]]=i;
    return make_pair(rank,argsort);
}

using vl=vector<ll>;
using vvl=vector<vector<ll>>;
using vvvl=vector<vector<vector<ll>>>; 
using vi=vector<int>;
using vvi=vector<vector<int>>;
using vvvi=vector<vector<vector<int>>>;
using P=array<ll,3>;
P op(P x,P y){
	ll t=min(x[0],y[1]);
	return {x[0]+y[0]-t,y[1]+x[1]-t,x[2]+y[2]+t};
}
P e(){
	return {0ll,0ll,0ll};
}
int main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	cout<<fixed<<setprecision(10);
	int n,q
	;cin>>n>>q;
	string s;
	cin>>s;
	atcoder::segtree<P,op,e> seg(n);
	for(int i=0;i<n;i++){
		if(s[i]=='(')seg.set(i,{1ll,0ll,0ll});
		else seg.set(i,{0ll,1ll,0ll});
	}
	while(q--){
		int c;
		cin>>c;
		if(c==1){
			int x,t;
			cin>>x>>t;
			x--;
			if(t==1)seg.set(x,{1ll,0ll,0ll});
			else seg.set(x,{0ll,1ll,0ll});
		}else{
			int l,r;
			cin>>l>>r;
			cout<<seg.prod(l-1,r)[2]*2<<endl;
		}
	}
}