Sergii Nagin

• Username: 6★sereja
• Country:  Ukraine
• Student/Professional:Student
• Institution:Taras Shevchenko National University of Kyiv
• 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: 40

Current Ratings Graph Old Ratings Graph

2398 (-11)RatingProvisional
Rating i Provisional Rating, click to know more

January Cook-Off 2013(2013-01-21 00:20:00)

Global Rank:   48

Cheated in:   

Ratings System Update

(2013-01-21 00:20:00)

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?

2398 (+195)RatingProvisional
Rating i Provisional Rating, click to know more

January Cook-Off 2013(2022-12-20 00:00:00)

Global Rank:   48

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 (40)

December 2010 Challenge

The Hungry Bear, A String Game

The December 2010 Cook-Off

Preparing Dishes, The Morning Commute, Pairing Chefs

January 2011 Challenge

Restaurant Expansion, Chess Pushing Game, Flu Shot Lineup, Splitting Giant Subs, Count Relations

The January 2011 Cook-Off

Holes in the text, Chef team, Whole submatrix

February 2011 Contest

Milestones, Coloring Colorable Graphs

February Cook - Off Challenge

Breaking Into Atoms, Three Way Communications

March 2011 Challenge

Omax

March Cook-off Challenge

Money Transformation, Snake Snaky, Grouping Chefs

April Long Contest

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

April Cook-Off Challenge

A Prime Conjecture, Internet Media Types

May Long Contest 2011

Tree Product, The Great Wall of Byteland

May Cook-off 2011

Popular Rice Recipe, Socializing Game around Pizza, Packing the Golden Triangles, Distribute idlis Equally

June Long Contest 2011

Mushroom Cave, Maximal Score Path, Chef Teams, Restock

June Cook-off

Longest Arithmetic Progressions, Correctness of Knight Move, Super-plane

July 2011 Long Contest

Wireless Network, Large Kitchen, A-E Hash Function, Most Popular Friend

August Long Contest 2011

Infinite Grid Game

August Cook-off 2011

Vote for the Noodle Soup, Open the Dragon Scroll, Rotate the String, Collect the Chocolate Chips

September Long Contest

Younger Brother, BIT Magazine

October Long Contest 2011

Dish Distribution, Lucky Palin

November Cook-Off

Colorful Chain, Moving Coins, Subanagrams

December Cook-Off

Ciel and New Menu, Ciel and Quiz Game, Ciel and A-B Problem

January 2012 Challenge

Houses and Restaurants, Lucky Sum

January Cook-Off

Collision in Space, Makx Sum, Remys last tour, Zeta-Nim Game

February 2012 Challenge

Lucky Count, Lucky Long, Word Couting, Count of Maximum

February 2012 Cook-off

Daily Train, Equation Solver

March 2012 Challenge

Longest Weird Subsequence, Lucky Number, Free Shuttle Service, Home Delivery, Spoon in Matrix

March Cook-Off 2012

Ciel Numbers I, Ciel Numbers II, Ciel and a new island

April Challenge 2012

Fit to Play, Double Strings, Stacking Pancakes, Greatest Dumpling Fight, Similar Graphs

April Cook-Off 2012

Selection for Training Camps, Top Batsmen, Crease Painting, Resistance, Best Buggy Ratings

May Challenge 2012

Digits Forest, Killing Gs, Little Elephant and Median, Jewels and Stones, Lucky lucky number, Divisible Pairs, Remember the recipe, Little Elephant and Boxes, A Home for Chef

May Cook-Off 2012

Little Elephant and Filling, Little Elephant and Balance, Little Elephant and Swapping, Little Elephant and Strings

June Challenge 2012

Little Elephant and Product, Little Elephant and Candies, Doom Bakes Cakes, Arranging Cup-cakes

July Challenge 2012

Favourite Numbers, Chef's Dream, My Fair Coins, The Gray-Similar Code, Little Elephant and Bubble Sort, Gift Rift, Restaurant Rating

August Challenge 2012

Little Elephant and Bombs, Lucky Driving, Range of Data, Delivery Boy

July Cook-Off 2012

Ciel and Receipt, Ciel and Map, Ciel and Tomya

August Cook-Off 2012

Codechef Password Recovery, Forced Output, Code Crazy Minions, Asmany Number Verification

September Challenge 2012

Kisses & Hugs, Racing Horses, ChefTown Parade, Three is Crowd

November Cook-Off 2012

Little Elephant and Magic, Little Elephant and Permutations, Little Elephant and Divisors

December Cook-Off 2012

Expected Greatest Common Divisor, Root of the Problem, Packaging Cupcakes, Reversing directions

January Cook-Off 2013

Minimum Distance, Many Chefs

Total Problems Solved: 148