Sort Colors

Medium

Arrays Sorting Two Pointers Two Pointers

Problem

Given an array nums with 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 0, 1, and 2 to represent the color red, white, and blue, respectively.

You must solve this problem without using the library's sort function.

Constraints

n == nums.length
1 <= n <= 300
nums[i] is either 0, 1, or 2

Examples

Input: nums = [2,0,2,1,1,0]

Output: [0,0,1,1,2,2]

The array is sorted in-place so all 0s come first, then all 1s, then all 2s.

Input: nums = [2,0,1]

Output: [0,1,2]

Each color appears exactly once, sorted in the correct order.

Loading...

Loading Python...