Alternating Permutations | Find k-th Lexicographical Alternating Permutation | C++ Coding Problem

In this video, we solve the Alternating Permutations Problem where given two integers n and k, we need to find the k-th alternating permutation of the first n positive integers in lexicographical order.

🔹 An alternating permutation ensures no two adjacent elements are both odd or both even.
🔹 If fewer than k valid permutations exist, we return an empty list.
🔹 Learn the step-by-step approach with C++ code implementation and detailed explanation.

We also discuss examples, constraints, and edge cases to make the concept crystal clear for coding interviews and competitive programming.

✅ Topics Covered:

Alternating Permutation Explanation

Lexicographical Order

Backtracking / DFS Approach

Handling Large Constraints (n up to 100, k up to 10^15)

C++ Solution Implementation

Perfect for LeetCode, Codeforces, Coding Interviews, and Competitive Programming preparation! 🚀
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Видео Alternating Permutations | Find k-th Lexicographical Alternating Permutation | C++ Coding Problem канала Coding theory