n = int(input())
mas = [int(i) for i in input().split()]

pr = 1
sum = 0

for i in range(n):
    if mas[i] < 0 and mas[i] % 3 == 0:
        pr = pr* mas[i]
    if mas[i] > 0 and mas[i] % 7 == 0:
        sum = sum + mas[i]

if pr == 1:
    print("отрицательных + кратных 3 не было ")
elif sum == 0:
    print("положительных + кратных 7 не было")
else:
    print(pr,sum)