Rajan Kumar Singh

• Username: 3★rajan10
• Country:  India
• Student/Professional:Student
• Institution:Xavier Institute of Engineering Mumbai, Maharashtra, India
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2025 (Jan-Jun)2024 (Jul-Dec)2024 (Jan-Jun)

Rating Graph

No. of Contests Participated: 17

Current Ratings Graph Old Ratings Graph

1654 (-10)RatingProvisional
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CodeChef Starters 17 Division 2 (Rated)(2021-11-17 23:00:02)

Global Rank:   2281

Cheated in:   

Ratings System Update

(2021-11-17 23:00:02)

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1654 (-77)RatingProvisional
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CodeChef Starters 17 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   2281

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 (17)

August Challenge 2020 Division 2

Another Card Game Problem, Chef Wars - Return of the Jedi, Smallest KMP, Chef and Linear Chess

September Challenge 2020 Division 2

A Problem on Sticks, Ada Matrix

August Lunchtime 2020 Division 2

Mode of Frequencies

October Challenge 2020 Division 2

Covid Run, Chef and Easy Queries

November Challenge 2020 Division 2

Ada and Dishes

March Challenge 2021 Division 3

Interesting XOR!, Chef and Groups, Space Arrays, No Time to Wait

March Lunchtime 2021 Division 3

Turn It, Lunchtime, Racing, Make the Sum Even, Motivation, Dinner by Candlelight

March CodeChef Starters 2021 Division 2 (Unrated)

College Life 5, Nobel Prize, Possible Victory

April Challenge 2021 Division 2

Chef and Dice

April Lunchtime 2021 Division 2

Array Rotation, Bench Press, Chef in Heaven

May Cook-Off 2021 Division 2

The Last Problem

May Challenge 2021 Division 2 (Rated)

Tree House, Xor Equality, Tic Tac Toe, Modular Equation

June Challenge 2021 Division 2 (Unrated)

Bella ciao, Summer Heat

August Challenge 2021 Division 2 (Unrated)

Olympics Ranking

CodeChef Starters 11 Division 2 (Rated)

The Grid Fill Problem, Obtain the Sum

CodeChef Starters 13 Division 2 (Rated)

Chef in Vaccination Queue, Magical Doors, Maximum Light Up, Add and Divide

September Lunchtime 2021 Division 2

Balanced and Unique Arrays, Yet another SOD problem

October Cook-Off 2021 Division 2

Can You Reach The End, Odd Sum, 01 Subsequence

October Lunchtime 2021 Division 2

Chef and Water Car, Exactly N plus 1 Values

CodeChef Starters 17 Division 2 (Rated)

GCD of Prefixes, New Piece

Total Problems Solved: 64