Denys Kopiychenko

• Username:2★mad0hatter
• Country:  United States
• Student/Professional:Professional
• Organisation:Thumbtack
• CodeChef Pro Plan: No Active Plan. View Details

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

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No. of Contests Participated: 1

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1512? (+12)RatingProvisional
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October Challenge 2015(2015-10-12 15:00:00)

Global Rank:   825

Cheated in:   

Ratings System Update

(2015-10-12 15:00:00)

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1512? (-101)RatingProvisional
Rating i Provisional Rating, click to know more

October Challenge 2015(2022-12-20 00:00:00)

Global Rank:   825

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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Contests (1)

October Challenge 2015

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

Total Problems Solved: 6