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In this post, you will find the solution for the **Sort Colors** **in C++, Java & Python-LeetCode problem**. We are providing the **correct and tested solutions** to coding problems present on **LeetCode**. If you are not able to solve any problem, then you can take help from our Blog/website.

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** Link for the Problem** – Sort Colors– LeetCode Problem

Sort Colors– LeetCode Problem

**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.

**Example 1:**

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

**Example 2:**

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

**Constraints:**

`n == nums.length`

`1 <= n <= 300`

`nums[i]`

is either`0`

,`1`

, or`2`

.

Sort Colors– LeetCode Solutions

Sort Colors in C++:

class Solution { public: void sortColors(vector<int>& nums) { int l = 0; // next 0 should be put in l int r = nums.size() - 1; // next 2 should be put in r for (int i = 0; i <= r;) if (nums[i] == 0) swap(nums[i++], nums[l++]); else if (nums[i] == 1) ++i; else // we may swap a 0 to index i, but we're still not sure whether // this 0 is put in the correct index, so we can't move pointer i swap(nums[i], nums[r--]); } };

Sort Colors in Java:

class Solution { public void sortColors(int[] nums) { int l = 0; // next 0 should be put in l int r = nums.length - 1; // next 2 should be put in r for (int i = 0; i <= r;) if (nums[i] == 0) swap(nums, i++, l++); else if (nums[i] == 1) ++i; else // we may swap a 0 to index i, but we're still not sure whether // this 0 is put in the correct index, so we can't move pointer i swap(nums, i, r--); } private void swap(int[] nums, int i, int j) { final int temp = nums[i]; nums[i] = nums[j]; nums[j] = temp; } }

Sort Colors in Python:

class Solution: def sortColors(self, nums: List[int]) -> None: zero = -1 one = -1 two = -1 for num in nums: if num == 0: two += 1 one += 1 zero += 1 nums[two] = 2 nums[one] = 1 nums[zero] = 0 elif num == 1: two += 1 one += 1 nums[two] = 2 nums[one] = 1 else: two += 1 nums[two] = 2