N = int(input())

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

if N == 1:
    print (A[0])
elif N == 2:
    print (A[0] * A[1])
elif N % 2 == 1:
    print (1)
else:

    ans = min(A[2] , A[0] * A[1] )
    print (ans)