Arun Sankar

• Username: 3★challenger21
• Country:  India
• Student/Professional:Student
• Institution:Indian Institute of Technology Palakkad Kerala, India
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2026 (Jan-Jun)2025 (Jul-Dec)2025 (Jan-Jun)

Rating Graph

No. of Contests Participated: 19

Current Ratings Graph Old Ratings Graph

1641 (+28)RatingProvisional
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Starters 49 Division 2 (Rated)(2022-07-27 23:30:02)

Global Rank:   516

Cheated in:   

Ratings System Update

(2022-07-27 23:30:02)

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1641 (-58)RatingProvisional
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Starters 49 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   516

Cheated in:   

Ratings System Update

(2022-12-20 00:00:00)

This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more

How the rating system works?

Learning Paths (0)

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Practice Paths (0)

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Contests (19)

SnackDown 2021 - Online Qualifiers

Lucky Number

SnackDown 2021 - Online Round 1A

Dance Moves, Min Max LCM

SnackDown 2021 - Online Round 1B

Queens Placement , Help Nishant, Largest Laddu

CodeChef Starters 21 Division 3 (Rated)

Devendra and Water Sports, Akash and Grid, Covid and Theatre Tickets

CodeChef Starters 22 Division 3 (Rated)

An Interesting Sequence, Even Subset Xor, Equal Card Game, Elections in Chefland

Infinity 2k21 Division 3 (Rated)

The Squid Game, Red Light, Green Light

Code Drive Division 3 (Rated)

Game between friends, Count Number of Peaks, Favourite String of Chef

January Long 2022 - I, Division 3 (Rated)

Covid Spread, Prime in a binary string, Keplers Law

January Long 2022 - II, Division 3 (Rated)

Crying Colours, TCS Examination, Chef and Fixed Deposits

Exun 2021-22 Division 3 (Rated)

Vishesh and his Popcorn Combo, Sarthak and his Magic Grid, Vedant and his Hidden Array

January Cook-Off 2022 Division 3

Palindromes Not Allowed, Mean Maximization, Mask Policy, Hungry Ashish

CodeChef Starters 23 Division 2 (Unrated)

Average of Three, Chef and Profits, Subarray Mex

January Lunchtime 2022 Division 2

Chef and Lockout Draws, Prefix Zeros, Subarray permutations, Chef and Subset Additions

CodeChef Starters 24 Division 2 (Rated)

Anti Palindrome, Avoid Contact, Badminton Serves, Divisors and Reciprocals, Yet Another Constructive Problem, EVM Hacking

February Long 2022 - I, Division 2 (Unrated)

Binary Base Basics, N Queens Puzzle Solved !, Chef and the Hair Salon

CodeChef Starters 25 Division 2 (Rated)

Equal MEX, Points and Lines

Starters 41 Division 2 (Rated)

Equal Integers, Is this priority or parity!, Path Parity

Starters 42 Division 2 (Rated)

Divisible by 3, Minimum or Maximum

Starters 43 Division 2 (Rated)

The Optimal Pairs, Distinct Palindrome

Starters 45 Division 2 (Rated)

Even Equal Odd, Retrieve the Array, Adjacent Sum Parity

Starters 46 Division 2 (Rated)

Prime Xor, Sort the String

Starters 47 Division 2 (Rated)

Similar Heights, End Sorted, Copy and Push Back

July Lunchtime 2022 Division 2 (Rated)

Easy Pronunciation, Yet Another Palindrome Making Problem, Largest Family

Starters 49 Division 2 (Rated)

Split The String, High Frequency, Monks, Valid Minimum

Total Problems Solved: 156