Alexey Prokopnev

• Username: 7★skyfire
• Country:  Belarus
• Student/Professional:Professional
• Organisation:Self Employed
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

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

Rating Graph

No. of Contests Participated: 16

Current Ratings Graph Old Ratings Graph

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February Challenge 2018(2018-02-12 15:00:00)

Global Rank:   31

Cheated in:   

Ratings System Update

(2018-02-12 15:00:00)

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2994 (+348)RatingProvisional
Rating i Provisional Rating, click to know more

February Challenge 2018(2022-12-20 00:00:00)

Global Rank:   31

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)

April Long Contest

Gravel, Number Game Revisited, Generalized Independent Sets, Graphs in Euclidean Space, Central Point, Rectangles Counting

May Long Contest 2011

Pruning Trees, Tree Product, The Great Wall of Byteland, Bickering Cooks, Sum Divides Product, Harmonious Decorating

July Challenge 2015

Addition and Multiplication, Maximum Difference Walk, Sereja and Game 2, Bread, A game on a graph, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles, Easy exam

September Challenge 2015

Filling the maze, 3D Queries, Chain of Doughnuts, Nikitosh and xor, Count Steps in Matrix, Terrible vectors, Bank robbery, Lighthouses, Cracking the Code, Chef and Chetris

April Challenge 2016

Amazing Experiment, Mario and Luigi, Help Watson Escape, Fibonacci Queries, Chef and Big Matrix, Chef and Ballons, Devu and good strings, Chef And Magical Path, Chef And Coloring, Game of snakes on a grid

May Challenge 2016

Sereja and GCD 2, Easy Queries, Chef and math, Chef and Balls, Forest Gathering, Chef and Amazingness of Numbers, Optimal Shopping II, Chef and Big Soccer, Laddu, Roads in Stars

June Challenge 2016

Chef And The Hiring Event, Chef and Rectangle Array, Chef and New Game, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Chef and cities, Misha and Geometry, Devu and an Array, Chef and Sad Pairs

July Challenge 2016

Andrash and Stipendium, Chef and Segments, Chef and Tetris, Chef and special numbers, Evaluate the polynomial, Chef and Robots Competition, Chefland and Electricity, Chef and Polyhedron, Defend the Recipe, Scheduling jobs on a cluster

August Challenge 2016

Chef and His Garden, Fighting Ebola, Chef and Circle Run, Chef and Chocolate, Chef and Round Run, Funny gnomes, Maximum Grid, Chef and Guard Towers, Chef and Tree, A Good Problem

January Challenge 2017

Capital Movement, Cats and Dogs, Sereja and Circles, Sereja and BOX, Coprime 6-tuples, Chef and Circle, Fantastic Four, Digits Cannot Separate, Reservior, Tourists in Mancunia

February Challenge 2017

Chef and Yoda, Primitive Queries, Interval Game, Sereja and Inversions, Rebel rescue, Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander, Alice and her garden

March Challenge 2017

Cooking Schedule, Completing favorite game, Path Triples On Tree, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, Bear and Cat Trap, (CH) Bear and Sorted Rows, Bandwidth of a matrix

April Challenge 2017

Chef and Digits, (CH) Serejs and Billiards, Bear and Random Grid, Chef and Divisor Tree, Stable market, Heavy-Light Decomposition, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes

August Long Challenge 2017

Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Hill Jumping, Walks on the binary tree, Palindromic Game, Mathison and the Data Warehouse (Challenge), Greedy Candidates, Strings and Graphs, Flower Pots

January Challenge 2018

(Challenge) Chef and Palindromes, Killing Monsters, A humongous Query, Simplify the Square Root, Killjee and k-th letter , K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

February Challenge 2018

Broken Clock, Lucas Theorem, Chef And Land Labeling, Chef And His Characters, Chef And The Patents, Chef and odd queries, Points Inside A Polygon, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome

Total Problems Solved: 161