Level 1 :

Complexity & Data Structures

Prerequisites

If Statement

Loops

Arrays

Strings

Topics

Complexity

Linked List

Stack

Queue

Resources and Tutorials

Videos & Tutorials

Time Complexity

Introduction To Linked List

Linked List Insert Implementation

Linked List Remove Implementation

Linked List Reverse, Search

Doubly Linked List Insert, Remove

Stack

Stack Implementation Using Array

Queue

Queue Array Implementation

Problems & Solutions

Easy

Contains Duplicate

Solution

Delete Node in a Linked List

Solution

Valid Parentheses

Solution

Implement Queue using Stacks

Solution

Presents

Solution

Woodcutters

Solution

Remove Duplicates from Sorted Array

Solution

Medium

Effective Approach

Solution

Min Stack

Solution

Evaluate Reverse Polish Notation

Solution

Number of Recent Calls

Solution

First Unique Character in a String

Solution

Next Greater Element I

Solution

Hard

Number of Ways

Solution

Merge k Sorted Lists

Solution

Design Circular Queue

Solution

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