Christos Amanatidis

• Username: 4★amanatidis_c
• Country:  Greece
• Student/Professional:Professional
• Organisation:Freelancer
• 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: 16

Current Ratings Graph Old Ratings Graph

1961 (+31)RatingProvisional
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January Challenge 2020 Division 1(2020-01-13 15:00:00)

Global Rank:   232

Cheated in:   

Ratings System Update

(2020-01-13 15:00:00)

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1961 (-24)RatingProvisional
Rating i Provisional Rating, click to know more

January Challenge 2020 Division 1(2022-12-20 00:00:00)

Global Rank:   232

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 (16)

October Challenge 2015

Who dares to be a millionaire, Count Subarrays, Rupsa and Equilateral Triangle

November Challenge 2015

Eugene and function, Simple Sum, Chef and cakes

December Challenge 2015

Chef and the stones, Plane Division

February Challenge 2016

Sereja and Two Lines, Chef and Strange Operations, Devu and a light discussion, Weird Sum, Rectangles of Love, Chef-Detective, Matrix Maximum Sum, Sereja and Permutations

March Challenge 2016

Palindromic substrings, maximize the sum, Sereja and Two Strings 2

April Challenge 2016

Help Watson Escape, Fibonacci Queries, Chef and Ballons, Chef And Magical Path, Chef And Coloring

June Challenge 2016

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

March Challenge 2017

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

January Challenge 2018

K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

February Challenge 2018

Chef And The Patents, Permutation and Palindrome, Car-pal Tunnel, Chef And His Characters, Broken Clock

March Challenge 2018 DIV 1

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

September Challenge 2018 Division 1

Bad Shuffle

October Challenge 2019 Division 2

Missing Number, Phone Prices, Operations on a Matrix, Array Modification, Chef and Maximum Star Value, Even Edges

November Challenge 2019 Division 1

Physical Exercise

December Challenge 2019 Division 2

Chefina and Ranges, Plus Multiply, Binary XOR, Easy Subsequence Selection, Sticky Notes, That Is My Score!, Addition

January Challenge 2020 Division 1

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

Total Problems Solved: 78