/*
first subtask: simulation, ez
second:you just query how many times the thing was on, you can ust count for each one
third:you have moements of turning on of each thing, you just wander the max on interval
fourth: first calculate the thing, then just min on interval
*/
#include <bits/stdc++.h>
using namespace std;
signed main(){
int n, q;cin>>n>>q;
string s;cin>>s;
vector<int> a;
for(int i = 0;i<n;i++){
if(s[i]=='1')a.push_back(1);
else a.push_back(0);
}
vector<vector<int>> events;
for(int i = 0;i<q;i++){
string ev;cin>>ev;
if(ev=="toggle"){
int x;cin>>x;
events.push_back({0, x});
}
else{
int x, y;cin>>x>>y;
events.push_back({1, x, y});
}
}
if(n<=200 && q<=200){
vector<vector<int>> strings={a};
for(auto thing:events){
if (thing[0]==0){
a[thing[1]-1]^=1;
}
else{
int tres = 0;
for(auto strin:strings){
bool res = true;
for(int i =thing[1]-1;i<thing[2]-1;i++){
if(strin[i]==0)res=false;
}
if(res)tres++;
}
cout << tres << '\n';
}
strings.push_back(a);
}
}
}
