30 Dec 75. Sort Colors
Given an array
n objects colored red, white, or blue, sort them in-place so that objects of the same color are adjacent, with the colors in the order red, white, and blue.
We will use the integers
2 to represent the color red, white, and blue, respectively.
You must solve this problem without using the library’s sort function.
Input: nums = [2,0,2,1,1,0] Output: [0,0,1,1,2,2]
Input: nums = [2,0,1] Output: [0,1,2]
n == nums.length
1 <= n <= 300