Practice depth first traversals

Flood fill


Integers multiplication

Ways to climb a stair case

Power Set

Binary tree–Paths with sum

Stock best buy & sell time

Find First Ancestor

Pangram Checking - Find smallest substring that contains list of chars

Calculate the sum of a nested list of int array, multiply by depth

Implement a queue using 2 stacks

Link: The Great Tree-List Recursion Problem

Calculate Permutations

Delete nodes with a given value from a doubly linked list

Implement a Semaphore

Build all project dependencies