from collections import Counter

N = int(input())
A = sorted(map(int, input().split()))
S = Counter(input().split())

if S["add"] == N:
    print(sum(A))
    exit()
elif S["max"] == N:
    print(max(A))
    exit()
elif S["min"] == N:
    print(0)
    exit()

ans = A[N - S["min"] - 1]
A.pop(N - S["min"] - 1)

if S["add"] > 0:
    S["add"] -= 1
else:
    S["max"] -= 1

for a in A:
    if S["add"] > 0:
        ans += a
        S["add"] -= 1
    elif S["max"] > 0:
        ans = max(ans, a)
        S["max"] -= 1
    else:
        ans = min(ans, a)
        break

print(ans)