n=int(input())
l=[int(i) for i in input().split()]
zeroes=l.count(0)
ones=l.count(1)
twos=l.count(2)
print("count of 0's,1's,2's :")  
print(zeroes,ones,twos)
while(zeroes!=0):
    print("0",end=" ")
    zeroes=zeroes-1
while(ones!=0):
    print("1",end=" ")
    ones=ones-1
while(twos!=0):
    print("2",end=" ")
    twos=twos-1
print()