75. Sort Colors!

class Solution {
    public void sortColors(int[] nums) {
        int left = 0;
        int right = nums.length-1;
        
        int i=0;
        while(i<=right){
            if(nums[i] == 0){
                swap(nums, i++, left++);
            }else if(nums[i]==2){
                swap(nums, i, right--);
            }else{
                i++;
            }
        }
    }
    
    private void swap(int[] nums, int i, int j){
        int temp = nums[i];
        nums[i] = nums[j];
        nums[j] = temp;
    }
}