import sys
input = lambda : sys.stdin.readline().rstrip()
sys.setrecursionlimit(max(1000, 10**9))
write = lambda x: sys.stdout.write(x+"\n")


n = int(input())
a = list(map(int, input().split()))
ans = 1
d = [None]*200
M = 10**9+7
def sub(k):
    if k>=200:
        return 1
    else:
        if d[k] is not None:
            return d[k]
        else:
            v = 1
            for num in range(1, k+1):
                v *= num
                v %= (M-1)
            val = pow(k, v, M)
            d[k] = val
            return val
if 0 in a:
    print(-1)
else:
    for k in a:
        ans *= sub(k)
        ans %= M
    print(ans%M)