Leetcode

How not to do LeetCoding?

My experience over solving 750 problems in leetcode

Leetcode: Split the Array to Make Coprime Products

Leetcode hard (it’s all about prime factors though)

Leetcode: House Robber IV

A tricky Binary Search problem

Leetcode: Paths in Matrix Whose Sum Is Divisible by K

A Dynamic Programming (DP) problem

Leetcode: Reverse Odd Levels of Binary Tree

A practice problem for a level-order traversal of a tree

Given the root of a perfect binary tree, reverse the node values at each odd level of the tree.

Leetcode: Longest Nice Subarray

A bitmask problem

You are given an array nums consisting of positive integers.

We call a subarray of nums nice if the bitwise AND of every pair of elements that are in different positions in the subarray is…

Leetcode: Amount of Time for Binary Tree to Be Infected

A binary tree/graph problem

Leetcode: a bitmask dp problem

Construct Smallest Number From DI String

You are given a 0-indexed string pattern of length n consisting of the characters 'I' meaning increasing and 'D' meaning decreasing.

Leetcode Contest 301: Move Pieces to Obtain a String

Linear Solution in Python

You are given two strings start and target, both of length n. Each string consists only of the characters 'L', 'R', and '_' where:

Leetcode: Design a Text Editor

let’s be introduced to deque data structure

Design a text editor with a cursor that can do the following:

• Add text to where the cursor is.
• Delete text from where the…