Roshan Kumar Singh

• Username: 3★roshan0504
• Country:  India
• Student/Professional:Student
• Institution:Indian Institute of Technology Bombay Mumbai, Maharashtra, 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: 17

Current Ratings Graph Old Ratings Graph

1646 (+28)RatingProvisional
Rating i Provisional Rating, click to know more

CodeChef Starters 22 Division 2 (Rated)(2022-01-19 23:00:02)

Global Rank:   1430

Cheated in:   

Ratings System Update

(2022-01-19 23:00:02)

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1646 (-109)RatingProvisional
Rating i Provisional Rating, click to know more

CodeChef Starters 22 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   1430

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)

February Challenge 2021 Division 3

Maximise Function, Chef and Meetings, Highest Divisor

April Challenge 2021 Division 3

Chef and Dice, Valid Pair, World Record, Strong Language

May Challenge 2021 Division 3 (Rated)

Xor Equality, Tic Tac Toe, Modular Equation, Golf, Solubility

September Cook-Off 2021 Division 3

Adjacency Hatred, Fake GCD, Zebra Crossing, Cars and Bikes

SnackDown 2021 - Online Qualifiers

Lucky Number, Maximum Number Of Distinct Elements

CodeChef Starters 11 Division 2 (Rated)

The Grid Fill Problem, Obtain the Sum

CodeChef Starters 13 Division 3 (Rated)

Chef in Vaccination Queue, The Preparations, Magical Doors

CodeChef Starters 14 Division 3 (Rated)

Odd GCD, Diagonal movement, FIXFIX, RCB and Playoffs

October Challenge 2021 Division 2 (Unrated)

MEX-OR, Longest AND Subarray

September Lunchtime 2021 Division 2

Balanced and Unique Arrays, Yet another SOD problem

CodeChef Starters 16 Division 3 (Rated)

Professor And Directions, Chef And Salary Pay, Pass or Fail

October Cook-Off 2021 Division 2

Odd Sum, 01 Subsequence

SnackDown 2021 - Online Round 1A

Round Robin Ranks , Dance Moves, Min Max LCM

SnackDown 2021 - Online Round 1B

Queens Placement , Largest Laddu, Help Nishant

CodeChef Starters 19 Division 3 (Rated)

Chef and Contest, Distinct Elements, Indivisible Permutation, Sleepy Chef

C.O.D.E.R.S Division 3 (Rated)

The One with Russ, The One Where It All Began

FizzBuzz Division 2 (Rated)

Magical Planks, Can_Reach

December Challenge 2021 Division 3 (Rated)

Check Mate, Valleys and Hills, List of Lists, Utkarsh and Placement tests

CodeChef Starters 22 Division 2 (Rated)

An Interesting Sequence, Even Subset Xor, Equal LIS

Total Problems Solved: 96