#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  int n;
  cin >> n;
  string s;
  cin >> s;
  vector<int> a(n);
  REP (i, n) cin >> a[i];
  int q;
  cin >> q;

  while (q--) {
    long long k;
    cin >> k;
    long long acc = 0;
    int ret = 0;
    int cnt = 0;
    for (int i = 0, j = 0; i < n; i++) {
      j = max(j, i);
      while (j < n && acc + a[j] <= k) {
        acc += a[j];
        if (s[j] == 'E')
          ++cnt;
        ++j;
      }
      
      ret = max(ret, cnt);
      if (i < j) {
        acc -= a[i];
        if (s[i] == 'E')
          --cnt;
      }
    }
      
    cout << ret << endl;
  }

  return 0;
}