N = int(input())
L = list(map(int,input().split()))
level = {1:0, 2:0, 3:0, 4:0, 5:0, 6:0}
i = 0

for value in L:
	level[value] += 1

for l in level:
	if i < level[l]:
		i = level[l]
		
print(i)