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Wed 08 Dec 2021
Lowest Common Ancestor of a Binary Tree
Questions involving the binary tree data structure are very popular in tech interviews, and can be challenging and varied! A binary tree is a data structure consisting of a collection of nodes (starting at a root node), where each node consists of a value (data), together with a directed edges to at most two nodes (the “left child” and “right child”), with the additional conditions that no two edges point to the same node and no edge points to the root. I recently solved an interesting problem on binary tree...
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Thu 04 Nov 2021
Ternary String solution Codeforces - 1354B
Ternary string is an interesting problem that could be solved using two pointers techniques. It’s a convenient way to keep track of multiple indices. This helps in making decisions based on two values...
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Tue 02 Nov 2021
Coin Change solution leetcode
It’s one of the most popular questions on leetcode that seems very easy at first. Coin change is a classic dynamic programming problem. I will proceed with an obvious (albeit wrong) solution and subsequently proceed to an efficient correct solution...
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