class Solution(object):
def sortColors(self, nums):
"""
:type nums: List[int]
:rtype: void Do not return anything, modify nums in-place instead.
"""
cnts=[0,0,0]
for i in range(len(nums)):
cnts[nums[i]]+=1
for i in range(cnts[0]):
nums[i]=0
for i in range(cnts[1]):
nums[i+cnts[0]]=1
for i in range(cnts[2]):
nums[i+cnts[0]+cnts[1]]=2