# coding: utf-8
# Your code here!
import sys
sys.setrecursionlimit(10**6)
readline = sys.stdin.readline
 
#h,w,k = [int(i) for i in readline().split()]
#n = int(input())
#ab = [[int(i) for i in readline().split()] for _ in range(n)]


n = int(input())
s = input()
a = [int(i) for i in readline().split()]
q = int(input())
k = [int(i) for i in readline().split()]


for ki in k:
    res = 0
    val = 0
    ans = 0
    r = 0
    for l in range(n):
        while r < n and res+a[r] <= ki:
            if s[r] == "E": val += 1
            res += a[r]
            r += 1
        #print(val,res,ki,ans)
        ans = max(ans, val)
        if s[l] == "E": val -= 1
        res -= a[l]

    print(ans)