from collections import deque
n = int(input())
a = list(map(int, input().split()))
a.sort()
a = deque(a)
for i in range(n-1):
    if i % 2 == 0:
        v1 = a.popleft()
        v2 = a.pop()
        a.append(v1*v2)
    else:
        a.pop()
        a.pop()
        a.appendleft(1)
print(a[0])