#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ull unsigned long long
#define ff first
#define ss second
#define pii pair<int,int>
#define pll pair<long long, long long>
#define vi vector<int>
#define vl vector<long long>
#define pb push_back
#define rep(i, b) for(int i = 0; i < (b); ++i)
#define rep2(i,a,b) for(int i = a; i <= (b); ++i)
#define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c)
#define count_bits(x) __builtin_popcountll((x))
#define all(x) (x).begin(),(x).end()
#define siz(x) (int)(x).size()
#define forall(it,x) for(auto& it:(x))
using namespace std;
//mt19937 mt;void random_start(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());}
//ll los(ll a, ll b) {return a + (mt() % (b-a+1));}
const int INF = 1e9+50;
const ll INF_L = 1e18+40;
const ll MOD = 1e9+7;
int n,m;
string s;
vi A;
int main()
{
ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
//random_start();
cin >> n >> m >> s;
s = "%"+s;
A.resize(m+1,1);
rep2(i,1,m) cin >> A[i];
int q;
cin >> q;
rep(i,q)
{
int l,r;
cin >> l >> r;
string s2 = s;
rep2(k,l,r)
{
int cur_poz = A[k];
// cout << cur_poz << " poz\n";
s2[cur_poz] = 'R';
while(cur_poz >= 1 && cur_poz <= n)
{
// cout << cur_poz << " xd\n";
if(s2[cur_poz] == 'R')
{
s2[cur_poz] = 'B';
cur_poz++;
}
else
{
s2[cur_poz] = 'R';
cur_poz--;
}
}
// cout << s2 << " s2\n";
}
int ans = 0;
forall(it,s2) if(it == 'R') ans++;
cout << ans << "\n";
}
}
