Valentin Borisov

• Username: 4★akat
• Country:  Bulgaria
• Student/Professional:Professional
• Organisation:Google
• CodeChef Pro Plan: No Active Plan. View Details

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

Rating Graph

No. of Contests Participated: 14

Current Ratings Graph Old Ratings Graph

1900 (+73)RatingProvisional
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July Lunchtime 2022 Division 2 (Rated)(2022-07-17 23:30:02)

Global Rank:   69

Cheated in:   

Ratings System Update

(2022-07-17 23:30:02)

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1900 (+53)RatingProvisional
Rating i Provisional Rating, click to know more

July Lunchtime 2022 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   69

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 (14)

April Cook-Off 2012

Top Batsmen

August Cook-Off 2012

Code Crazy Minions

July Cook-Off 2014

Copy-Paste, Sum Queries, Friends

August Cook-Off 2014

Tree Game, Permutation Shuffle

June Lunchtime 2014

The Smallest Pair, Dynamic Inversion

July Lunchtime 2014

And Operation, Shift The String

September Challenge 2015

Count Steps in Matrix, Chain of Doughnuts

December Challenge 2015

Chef and the stones

August Lunchtime 2015

Churu and lost string, Minimum Maximum

October Lunchtime 2015

emitL

February Challenge 2016

Chef-Detective

March Cook-Off 2016

Digital clock, Alternating subarray prefix

July Lunchtime 2022 Division 2 (Rated)

Easy Pronunciation, Yet Another Palindrome Making Problem, Consecutive XOR, Maximum Median Matching, Largest Family

Total Problems Solved: 36