(``` class Solution {
public void sortColors(int[] nums) {
int count0=0,count1=0,count2=0;
for(int i=0;i<nums.length;i++){
if(nums[i]==0)
count0++;
if(nums[i]==1)
count1++;
else
count2++;
}
count1=count0+count1;
count2=count1+count2;
for(int i=0;i<nums.length;i++){
if(i<count0)
nums[i]=0;
else if(i<count1)
nums[i]=1;
else if(i<count2)
nums[i]=2;
}
}} ```)