Problem Statement:


Given two integers n and k, return all possible combinations of k numbers out of 1 ... n.
You may return the answer in any order.

Example :
Input: n = 4, k = 2
Output:
[
  [2,4],
  [3,4],
  [2,3],
  [1,2],
  [1,3],
  [1,4],
]


Solution:


  • NOTE: I highly recommend going through the Backtracking chapters in the order they are given in the Index page to get the most out of it and be able to build a rock-solid understanding.

Algorithm:



Login to Access Content




Java Code:



Login to Access Content



Python Code:



Login to Access Content




Don't forget to take in-depth look at the other backtracking problems because that is what would make you comfortable with using the backtracking template and master the art of Backtracking:


Instructor:



If you have any feedback, please use this form: https://thealgorists.com/Feedback.



Help Your Friends save 40% on our products

wave