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

A.sort()
n = S.count("min")
A = A[:N - n]
if len(S) == 0:
  print(0)
  exit()
n = S.count("add") - 1
ans = A[-1]
if n != -1:
  ans += sum(A[:n])
print(ans)