SHUBHAM KUMAR

• Username: 4★hacker_sk
• Country:  India
• Student/Professional:Other
• 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: 22

Current Ratings Graph Old Ratings Graph

1896 (-8)RatingProvisional
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Starters 199 (Rated)(2025-08-13 22:00:02)

Global Rank:   565

Cheated in:   

Ratings System Update

(2025-08-13 22:00:02)

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1943 (-85)RatingProvisional
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April Challenge 2020 Division 1(2022-12-20 00:00:00)

Global Rank:   198

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 (22)

September Challenge 2016

Dividing Machine, Chef and Friends, Chef and calculation, Chef and digits of a number, Faded Palindromes

October Challenge 2016

Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs

November Challenge 2016

Count Permutations, Chef and squares, Task for Alexey

August Lunchtime 2016

Studying Alphabet

January Challenge 2017

Capital Movement, Reservior, Cats and Dogs

February Challenge 2017

Eugene and big number, Chef and Triangles, Chef and his Best Friend, Chef and His Apartment Dues, Gerrymander

March Challenge 2017

Bandwidth of a matrix, Bear and Extra Number, Xenny and Alternating Tasks

April Challenge 2017

Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes, Chef and Divisor Tree

May Challenge 2017

Courses in an university, Chef and Subsequences, Median of adjacent maximum numbers, Blocked websites, Chef and his daily routine, Gotham PD, Long Sandwich , Chef and Sub Array

June Challenge 2017

Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets

September Challenge 2017

Minimum Good Permutation, Little Chef and Sums, Sereja and Commands, Chef and Pick Digit

October Challenge 2017

Chef and Cycled Cycles, Max Mex, A Balanced Contest, Chef and Magic Arrays

March Cook-Off 2017

Safe Robot

June Cook-Off 2017

Ada and crayons, SnackUp

August Cook-Off 2017

Real obtuse, From heaven to earth

May Lunchtime 2017

Prefix Inversions

June Lunchtime 2017

Maximum Unique Segment, Two Numbers

February Challenge 2018

Broken Clock, Chef And His Characters, Chef And The Patents, Permutation and Palindrome

March Challenge 2018 DIV 1

Chef and Easy Problem, Mix the Colors, Minions and Voting

March Lunchtime 2018 Division 2 (Unrated)

Magic Elements, Three Integers, Partitions, Chef and Friends

April Challenge 2018 Division 2

Chef and Array (Challenge), Cutting Plants, Weight of Numbers, Highway Crossing, Count Good Prefixes, Average of Pairs, Workers

Dementia (Rated for Division 2)

Strings, Chef and Replication

LoC April 2018 (Rated for Division 2)

Bob and Pallindromes

April Challenge 2020 Division 1

Strange Number, Leaked Answers (Challenge), Factor Tree, Ready Bitwise, Perfect Power Divisors, Squared Subsequences

Starters 196 (Rated)

Sugar Limit, Append Average

Starters 199 (Rated)

Perfect Ranges, Fence Colouring, Grid MEX, Subtract or Divide

Total Problems Solved: 124