#include <bits/stdc++.h>
using namespace std;
typedef long double ld;
typedef long long ll;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef vector<pair<int,int>> vpi;
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)
#define pb push_back
#define rsz resize
#define sz(x) int(x.size())
#define all(x) begin(x), end(x)
#define fi first
#define se second
bool valid(string s, int a, int b)
{
//cout<<s<<' '<<a<<' '<<b<<'\n';
FOR(i,a,b)
{
if(s[i]=='0')return 0;
}
return 1;
}
int const N=3e5+3;
vi bad[N];
int main()
{
ios_base::sync_with_stdio(0); cin.tie(0);
int n,q;
cin>>n>>q;
string s;
cin>>s;
F0R(p,q)
{
string t;
cin>>t;
if(t=="toggle")
{
int i;
cin>>i;
--i;
bad[i].pb(p);
}
else
{
int a,b;
cin>>a>>b;
--a;--b;
bool stat=s[a]-'0';
int ans=0;
int prev=0;
trav(e,bad[a])
{
if(stat)
{
ans+=e+1-prev;
}
stat=!stat;
prev=e+1;
}
if(stat)ans+=p+1-prev;
cout<<ans<<'\n';
}
}
return 0;
}
