a = []
n = int(input())
min_k = 100000000000
min_k2 = 10000000
min_nk = 100001
min_mull = 1001*1001

for i in range(7):
    a.append(int(input()))
for k in range(7, n):
    num = int(input())
    if (a[0] % 2 == 0) and (a[0] < min_nk):
        min_nk = a[0]
    if (min_nk * num) < min_mull and (min_nk * num) % 2 == 0:
        min_mull = min_nk * num
    for x in range(0, 6):
        a[x] = a[x+1]
print(min_mull)