def main():
    N = int(input())
    *A, = map(int, input().split())
    s = input()
    t = ''.join(['<' if A[i] < A[i+1] else '>' for i in range(N-1)])
    t = t + ('<' if A[-1] < A[0] else '>') + t
    print(t.find(s))


if __name__ == '__main__':
    main()