Coding Tasks

Code them in IntelliJ, timed, no AI. 0/16 done.

Data Processing

○JSON Diet Data (Toptal round-4, redone)OURSMedium ○CSV Sales ReportOURSEasy

Arrays & Hashing

○Two SumEasy ○Valid AnagramEasy ○Group AnagramsMedium ○Top K Frequent ElementsMedium

Two Pointers

○Valid PalindromeEasy ○3SumMedium

Sliding Window

○Best Time to Buy and Sell StockEasy ○Longest Substring Without Repeating CharactersMedium

Stack

○Valid ParenthesesEasy

Binary Search

○Binary SearchEasy

Trees

○Invert Binary TreeEasy ○Binary Tree Level Order TraversalMedium

Graphs

○Number of IslandsMedium

Dynamic Programming

○Climbing StairsEasy