from heapq import heappop, heappush
import sys
input = sys.stdin.readline

n = int(input())
A = list(map(int, input().split()))

cnt = 0
while len(A) > 1:
    a = heappop(A)
    b = heappop(A)
    if cnt % 2 == 0:
        temp = a * b
        heappush(A, -1 * temp)
    else:
        a *= -1
        temp = (b + a - 1) // a
        heappush(A, temp)
    cnt += 1
print(abs(A[0]))