#include <bits/stdc++.h>
#define pb push_back
#define endl ("\n")
#define all(aa) aa.begin(), aa.end()
typedef long long ll;
using namespace std;
int main(){
int n, q;
cin >> n >> q;
vector<int> v(n);
string s;
cin >> s;
for(int i = 0; i < n; i++) v[i] = (s[i] == '1');
vector<vector<pair<int, int>>> Q(n);
for(int i = 1; i <= q; i++){
string t;
cin >> t;
if(t == "toggle"){
int a; cin >> a; a--;
Q[a].pb({i, 0});
}
else{
int l, r; cin >> l >> r;
l--, r -= 2;
Q[l].pb({i, 1});
}
}
vector<int> ans(q + 1, -1);
for(int i = 0; i < n; i++){
ll one = v[i];
ll cev = 0;
ll time = 0;
for(auto [a, t] : Q[i]){
cev += one * (a - time);
if(t == 0){
one ^=1;
}
else{
ans[a] = cev;
}
time = a;
}
}
for(int i = 0; i <= q; i++){
if(ans[i] != -1){
cout << ans[i] << endl;
}
}
}
