import itertools import sys n = int(input()) lst = list(map(int,input().split())) m = sum(lst)/2 #分组:3的倍数、5的倍数、其它 lst3,lst5,lst0=[],[],[] for i in range(n): if lst[i]%3 == 0: lst3.append(lst[i]) elif lst[i] % 5 == 0: lst5.append(lst[i]) else: lst0.append(lst[i]) #判断 if lst0: for r in range(1,len(lst...