Rishabh Kumar

• Username: 4★rk9456rk
• Country:  India
• Student/Professional:Student
• Institution:Indian Institute of Technology Dhanbad
• 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: 23

Current Ratings Graph Old Ratings Graph

1874 (+21)RatingProvisional
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May Challenge 2021 Division 2 (Rated)(2021-05-17 15:00:02)

Global Rank:   306

Cheated in:   

Ratings System Update

(2021-05-17 15:00:02)

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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1874 (-20)RatingProvisional
Rating i Provisional Rating, click to know more

May Challenge 2021 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   306

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 (23)

December Challenge 2019 Division 2

That Is My Score!, Plus Multiply

January Challenge 2020 Division 2

Breaking Bricks

February Challenge 2020 Division 2

School of Geometry, Hard Cash

March Challenge 2020 Division 2

Pintu and Fruits

April Challenge 2020 Division 2

Strange Number, Sell All the Cars, COVID Pandemic and Long Queue

May Challenge 2020 Division 2

Coronavirus Spread, Isolation Centers

March Cook-Off 2020 Division 2

Find Your Gift

January Lunchtime 2020 Division 2

Bob and His Friends, Chef and Street Food

June Challenge 2020 Division 2

Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control

July Challenge 2020 Division 2

Ada King, Chef and Strings, Chef and Card Game, Missing a Point, Chefina and Swaps, Doctor Chef

August Challenge 2020 Division 2

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

September Challenge 2020 Division 2

Chefina and Swap, Ada Matrix, Find XOR, Chef and Trump Cards, A Problem on Sticks

June Cook-Off 2020 Division 2

Cache Hits, Max Mex

October Challenge 2020 Division 2

Chef and Easy Queries, Covid Run, Positive AND, Replace for X

November Challenge 2020 Division 2

Ada and Dishes, Magical Candy Store, Iron, Magnet and Wall, Restore Sequence

January Challenge 2021 Division 2

Chef and Ants, Watching CPL, Fair Elections

December Challenge 2020 Division 1

Hail XOR, Positive Prefixes, Even Pair Sum

September Lunchtime 2020 Division 2

GCD operations, Watermelon

February Challenge 2021 Division 2

Frog Sort, Team Name, Prime Game, Multiple Games, Maximise Function

March Challenge 2021 Division 2

Space Arrays, Paparazzi Gennady, Consecutive Adding, Interesting XOR!, College Life 4

April Challenge 2021 Division 2

Binary String MEX, Tree Permutations, Worthy Matrix, Chef and Dice

May Challenge 2021 Division 2 (Rated)

Tic Tac Toe, Modular Equation, Xor Equality, An Interesting Sequence, Tree House, Valid Paths

SnackDown 2021 - Online Qualifiers

Lucky Number, Maximum Number Of Distinct Elements

SnackDown 2021 - Online Round 1A

Round Robin Ranks , Dance Moves, Min Max LCM

SnackDown 2021 - Online Round 1B

Queens Placement , Largest Laddu, Help Nishant

Total Problems Solved: 107