Jack

• Username: 5★jackthekid
• Country:  Poland
• Student/Professional:Other
• CodeChef Pro Plan: No Active Plan. View Details

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

Rating Graph

No. of Contests Participated: 26

Current Ratings Graph Old Ratings Graph

2141 (+31)RatingProvisional
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July Cook-Off 2020 Division 1(2020-07-20 00:00:00)

Global Rank:   86

Cheated in:   

Ratings System Update

(2020-07-20 00:00:00)

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

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2141 (-155)RatingProvisional
Rating i Provisional Rating, click to know more

July Cook-Off 2020 Division 1(2022-12-20 00:00:00)

Global Rank:   86

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 (26)

December Cook-Off 2017

Football Match, Beautiful Array

February Cook-Off 2018

Chef and Cook-Off

February Lunchtime 2018

Game with numbers, Jumping in the hills

August Cook-Off 2018 Division 2

GukiZ and Candies, Mixi Game, Balsa For The Three

May Lunchtime 2018 Division 1

Count Substrings, Shifted Palindrome

August Challenge 2018 Division 2

Problem Sort, Spell Bob, Sheokand and Number, Modular GCD, Coordinate Compression

November Challenge 2018 Division 1

Appy Loves One, Good Median, Magician versus Chef 2

October Challenge 2018 Division 2

Chef and Circles, Byte to Bit, Chef and Surprise Chessboard, Minimize Digitsum, Appy and Balloons , Chef and Serves

Quick Code (Rated for Division 2)

Immortal Frieza, Dr Geros lab, Krillin is dead AGAIN

December Lunchtime 2018 Division 1

Choosing from Buckets, Age Calculator

September Challenge 2019 Division 1

Chef and Good Subsequences, Chef and Interesting Subsequences , Fuzzy Linear Combinations, Easy Fibonacci

September Lunchtime 2019 Division 1

All Substrings, Treeversion, Find the Sum

October Mega Cook-Off 2019 Division 1

D-Or

October Lunchtime 2019 Division 1 (Unrated)

Counting Inversions Again!, Box Game

January Challenge 2020 Division 1

Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English

January Cook-Off 2020 Division 1

Profitable Paths, Chefina and Sums

April Cook-Off 2020 Division 1

Tower Counting

Exun Programming Prelims 2019 (Rated for all)

Tennis Tournament, Yet Another Partition Problem, Chipped Tree, Weird Modulo Problem

ENIGMA - PLINTH'20 LNMIIT (Rated for all)

Corruption in Freedonia, Gru is Handing Out Bananas, Minion AND Range, Is it Sorted or Not, That is the Question, Recruit Villagers

July Cook-Off 2020 Division 1

What Is This, a Crossover Episode, Path-etic Products, Even-tual Reduction, OR-thodox Distinction

June Cook-Off 2020 Division 1

Per Capita Income, Checkpoints, Banned Quotient

June Lunchtime 2020 Division 1

Maximum AND, Gold Mining, Square Submatrices

RECode 12.0 (Rated for all)

Chef and String, Chef and Numbers, Chef and Rotation, Chef and Walk

Coders' Legacy (Rated for all)

Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift, Unique Substring

Total Problems Solved: 113