John O'Hollaren

• Username: 2★johnyo
• Student/Professional:Student
• Institution:Duke University
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

Last 6 Months 2026 (Jan-Jun)2025 (Jul-Dec)2025 (Jan-Jun)

Rating Graph

No. of Contests Participated: 4

Current Ratings Graph Old Ratings Graph

1586? (+33)RatingProvisional
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March Challenge 2013(2013-03-11 15:00:00)

Global Rank:   1277

Cheated in:   

Ratings System Update

(2013-03-11 15:00:00)

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1586 (-51)RatingProvisional
Rating i Provisional Rating, click to know more

March Challenge 2013(2022-12-20 00:00:00)

Global Rank:   1277

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 (4)

December Cook-Off 2012

Packaging Cupcakes

January Challenge 2013

The Minimum Number Of Moves, A Fence for Byteland, Chef of the Year, Three Different Numbers

January Cook-Off 2013

Minimum Distance, Many Chefs

March Challenge 2013

Tourist Translations, Approximately, Minesweeper

Total Problems Solved: 19