Solving LeetCode 77: k-element Combinations with Backtracking and Pruning
Problem Statement (LeetCode 77) Given two integers n and k, return all possible combinations of k numbers chosen from the range [1, n]. You may return the answer in any order. Example 1 Input: n = 4, k = 2 Output: [ [2,4], [3,4], [2,3], [1,2], [1,3], [1,4] ] Example 2 Input: n = 1, k = 1 Output: [[1...