Rajat Singh

• Username: 3★coderaj
• Country:  India
• Student/Professional:Student
• Institution:Vellore Institute of Technology, Vellore
• 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: 34

Current Ratings Graph Old Ratings Graph

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December Lunchtime 2016(2016-12-31 22:30:00)

Global Rank:   465

Cheated in:   

Ratings System Update

(2016-12-31 22:30:00)

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

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1714 (-1)RatingProvisional
Rating i Provisional Rating, click to know more

December Lunchtime 2016(2022-12-20 00:00:00)

Global Rank:   465

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 (34)

April Cook-Off 2014

Snape and Ladder

July Cook-Off 2014

Copy-Paste

April Challenge 2014

Farmer Feb

July Challenge 2014

Chef and Rectangle Genome, Count Substrings, Reach The Point

August Challenge 2014

The Leaking Robot, Chef and Gift

September Challenge 2014

Factorisation, Chef and Left-Right, Fun with Rotation

October Challenge 2014

Chef and Ground

December Challenge 2014

Chef and Apple Trees

January Challenge 2015

Sereja and Votes, One Dimensional Kingdoms, Chef and Stones

January Lunchtime 2015

Piece of cake

February Challenge 2015

Chef and Chain, Let us play with rank list, Chef and Equality

June Challenge 2015

Chef and Memory Limit, Chef and Polygons

July Challenge 2015

Na2a and lucky stone, Chef and Cube

August Challenge 2015

Aditi and Magic Trick, Gravity Guy, Way Out, Cooking Machine

August Cook-Off 2015

Chef and the XORed Number , Chef and the Wildcard Matching

September Mega Cook-Off 2015

Forgotten Language, Stacks

May Lunchtime 2015

Devu and Grapes

June Lunchtime 2015

Chef and Two Strings

August Lunchtime 2015

Minimum Maximum

September Lunchtime 2015

Sum of palindromic numbers

October Lunchtime 2015

emitL

December Lunchtime 2015

Distinct Codes

June Challenge 2016

Chef And The Hiring Event, Devu and an Array, Chef and Coins Game, Chef And Binary Operation, Chef and Array and K

January Cook-Off 2016

Chef and Fruits

March Cook-Off 2016

Digital clock, Alternating subarray prefix

May Cook-Off 2016

Phantasialand

January Lunchtime 2016

Triangle Classification

March Lunchtime 2016

Simple Statistics

December Lunchtime 2016

Superheroes and villains

Total Problems Solved: 322