Sort Colors LeetCode Programming Solutions | LeetCode Problem Solutions in C++, Java, & Python [💯Correct]

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Hello Programmers/Coders, Today we are going to share solutions to the Programming problems of LeetCode Solutions in C++, Java, & Python. At Each Problem with Successful submission with all Test Cases Passed, you will get a score or marks and LeetCode Coins. And after solving maximum problems, you will be getting stars. This will highlight your profile to the recruiters.

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 ProblemSort Colors– LeetCode Problem

Sort Colors– LeetCode 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 01, 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]


  • n == nums.length
  • 1 <= n <= 300
  • nums[i] is either 01, or 2.
Sort Colors– LeetCode Solutions
Sort Colors in C++:
class Solution {
  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)
        // 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)
        // 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
        two += 1
        nums[two] = 2

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