#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define F first
#define S second
#define pb push_back
#define ppb pop_back
#define ep insert
#define endl '\n'
#define elif else if
#define pow pwr
#define sqrt sqrtt
#define int long long
#define ll long long
typedef unsigned long long ull;
using namespace std;
const int N=7005;
int n,m,q,a[N];
bool b[N];
int32_t main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
cin>>n>>m;
for (int i=1;i<=n;i++){
char c;cin>>c;
if (c=='R') b[i]=1;
}
for (int i=1;i<=m;i++) cin>>a[i];
cin>>q;
while (q--){
int l,r;
cin>>l>>r;
for (int i=l;i<=r;i++){
int j=a[i];b[j]=1;
while (j && j<=n){
if (b[j]) b[j]=0,j++;
else b[j]=1,j--;
}
/*for (int k=1;k<=n;k++){
if (b[k]) cout<<'R';
else cout<<'B';
}cout<<endl;*/
}int ans=0;
for (int i=1;i<=n;i++) ans+=b[i];
cout<<ans<<endl;
}
return 0;
}
