/*
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;
bool isss2=true;
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;
if(y-x!=1)isss2=false;
events.push_back({1, x, y});
}
}
//range max of "on times"
if(isss2){
vector<int> count=a;
vector<int> state=a;
vector<int> lastc(n, 0);
for(int i = 0;i<q;i++){
auto thing = events[i];
if(thing[0]==0){
if(state[thing[1]-1]==1)count[thing[1]-1]+=(i-lastc[thing[1]-1]);
state[thing[1]-1]^=1;
lastc[thing[1]-1]=i;
}
else{
int res = count[thing[1]-1];
if(state[thing[1]-1]==1)res+=(i-lastc[thing[1]-1]);
cout << res << '\n';
}
}
return 0;
}
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);
}
}
}
