Arrays

Last Updated: Nov 17, 2023

Contents

Pointers and arrays

This is very relevant for C/C++ users. Might not be as useful to users of Java / Python.

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Primers

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Examples

Spiral Order Matrix I

68:00 Mins

60 Pts

Max Non Negative SubArray

Arrays Problems

0/10

Array Math

Pick from both sides!

56:36 Mins

100 Pts

Min Steps in Infinite Grid

37:51 Mins

150 Pts

Minimum Lights to Activate

Max Sum Contiguous Subarray

Maximum Absolute Difference

Maximum Area of Triangle!

0/3

Value ranges

Merge Overlapping Intervals

48:24 Mins

225 Pts

0/9

Simulation array

Perfect Peak of Array

Make equal elements Array

37:05 Mins

200 Pts

Segregate 0s and 1s in an array

Kth Row of Pascal's Triangle

28:32 Mins

225 Pts

Spiral Order Matrix II

0/4

Bucketing

Triplets with Sum between given range

Find Duplicate in Array

40:13 Mins

450 Pts

Maximum Consecutive Gap

58:46 Mins

450 Pts

0/5

Arrangement

Sort array with squares!

0/1

Hash Search

Occurence of Each Number

28:20 Mins

200 Pts

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Sorting

Noble Integer

43:30 Mins

200 Pts

Reorder Data in Log Files

Hotel Bookings Possible

Maximum Unsorted Subarray

68:52 Mins

250 Pts

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Space recycle

Set Matrix Zeros

48:04 Mins

300 Pts

Maximum Sum Square SubMatrix

58:56 Mins

300 Pts

0/3

Missing / Repeated number

First Missing Integer

64:38 Mins

300 Pts

Repeat and Missing Number Array

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Arrays

Level 1

Time Complexity

How to Calculate Running Time?

Asymptotic notations

How to Calculate Time Complexity?

Time Complexity Examples

Relevance of time complexity

Space Complexity

Level 2

Arrays

Introduction to pointers in C/C++

Arrays in programming - fundamentals

Pointers and arrays

Pointers and 2-D arrays

Array Implementation Details

Sorting Algorithms

Insertion sort algorithm

Merge sort algorithm

QuickSort Algorithm

Sort Implementation Details

Selection Sort

Bubble Sort

Math

Math Introduction

Factorization

Base number system

Unary number system

Binary number system

Base conversions for base N

Level 3

Binary Search

Binary Search Implementations and common errors

Binary Search Algorithm

Applications of Binary Search

Beyond Sorted Array Binary Search

Advantages and Disadvantages of Binary Search

Strings

For C / C++ users,

For C / C++ users ( contd ),

String Implementation Details

Bit Manipulation

What is Binary Number System?

Understanding Data Types

Bitwise Operators

Bitwise Operators Examples

Bitwise and Logical Operators

Two Pointers

TWO POINTERS

Level 4

Linked Lists

Introduction to linked list

Arrays vs Linked Lists

Linked List Implementation

Doubly linked list

Doubly Linked List Implementation

Stacks And Queues

Introduction to Stack

Array implementation of Stack

Linked List implementation of stack

Stack Implementation Details

Introduction to Queues

Array implementation of Queues

Linked List implementation of Queue

Queue Implementation Details

Level 5

Backtracking

Recursion basics - using factorial

Complexity analysis of recursive programs

Why recursion is not always good

Time Complexity analysis of recursion

Space complexity analysis of recursion

Maze Traversal Algorithm Using Backtracking

Graph Coloring Algorithm using Backtracking

Hashing

Introduction to hashing

Key terms in Hashing

Hashing Techniques

Hashing Implementation Details

Hashing Summary

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