Radostin Chonev

• Username: 6★ronniechonev
• Country:  Bulgaria
• Student/Professional:Student
• Institution:University of Oxford England, United Kingdom
• 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: 25

Current Ratings Graph Old Ratings Graph

2477 (+25)RatingProvisional
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February Cook-Off 2023 Division 1 (Rated)(2023-02-08 22:30:00)

Global Rank:   42

Cheated in:   

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(2023-02-08 22:30:00)

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2452 (-78)RatingProvisional
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September Lunchtime 2022 Division 1 (Rated) (Based on EJOI)(2022-12-20 00:00:00)

Global Rank:   16

Cheated in:   

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(2022-12-20 00:00:00)

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Learning Paths (0)

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Contests (25)

December Cook-Off 2012

Root of the Problem, Packaging Cupcakes, Reversing directions

June Challenge 2016

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

July Challenge 2016

Andrash and Stipendium, Chef and Segments, Chef and special numbers, Chef and Robots Competition, Chefland and Electricity

September Challenge 2016

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

October Challenge 2016

Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Chef and Two String

November Challenge 2016

Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Chef and squares, Task for Alexey

December Challenge 2016

Train Partner, Kth Max Subarray, Kirito in labyrinth, Our Base is Under Attack

February Challenge 2017

Interval Game, Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander

March Challenge 2017

Cooking Schedule, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, Bandwidth of a matrix

April Challenge 2017

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

September Challenge 2017

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

December Challenge 2017

Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays

March Challenge 2018 DIV 1

Pishty and Triangles, Chef and Easy Problem, Chef and Gcd Queries, Mix the Colors, Minions and Voting

December Challenge 2018 Division 1

(Challenge) Delete DAG, Colorblind Feast, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR

May Lunchtime 2020 Division 1

Absolute Min Max, Escape One, Convert the String, Tree difference

January Challenge 2021 Division 1

Chef and Ants, Guess the Tiling, Expected Number of SCCs, Blackjack

December Cook-Off 2020 Division 1

Self-Destructing Strings, Sed Passwords, Circle of Chaos, Carry All Fruits

January Cook-Off 2021 Division 1

Mex Subsequence, Not Too Colourful, Prefix And, Common Ancestors

December Lunchtime 2020 Division 1 (Unrated)

K-Tuple Tree, Even Sequence, Three Letters, One Zero Swaps

January Lunchtime 2021 Division 1 (Unrated)

Good Grid, Shifting Spoons, Dreams of Divisibility, Even Sum

March Cook-Off 2021 Division 1

Consecutive Deletions, Water Transfer, Chef and Sorting

August Lunchtime 2021 Division 1

Bunny Hops, Min-Max Path, Just a Graph, Longest Spanning Substrings, Chef and Deque

September Lunchtime 2021 Division 1

Range Array, Interesting Representation, Subsequence LCS, Alice vs Bob Faceoff

July Lunchtime 2022 Division 1 (Rated)

Tree Interval Queries, Inversions Retrieval, Binary String Happiness, Consecutive XOR, Largest Family

September Lunchtime 2022 Division 1 (Rated) (Based on EJOI)

Increasing Addition, Remove Numbers, Adjacent Pairs, Where Is the Root, Longest Unfriendly Subsequence

February Cook-Off 2023 Division 1 (Rated)

Take Not Less, Alice Potter and OWL, Alice Potter And Dumbledore Army

Total Problems Solved: 154