# LeetCode

## LeetCode: Longest Consecutive Sequence

3 Solutions for longest consecutive sequence

## LeetCode: Serialize and Deserialize N-ary Tree

Solution for LeetCode challenge: Serialize and Deserialize N-ary Tree

## LeetCode: Unique Paths II

Solution for LeetCode: Unique Path II, Depth-first-search algorithm with memorization.

Solution for LeetCode challenge: Add strings

## LeetCode: Populating Next Right Pointers in Each Node

With algorithm of level traverse of a binary tree

## LeetCode: Clone Binary Tree With Random Pointer

Recursive algorithms with a map for ‘Clone Binary Tree With Random Pointer’

## Kth Largest Element in an Array

3 Solutions for finding the Kth Largest Element in an Array.

## Validate Binary Search Tree

How to Validate Binary Search Tree with recursive algorithms.

## Excel Sheet Column Title

A algorithm to convert a decimal number into a 26-based number.

## Lowest Common Ancestor of a Binary Search Tree

Explain the recursive and interactive algorithms to find the lowest common ancestor (LCA) of Binary Search Tree.