Liu Yubo

• Username: 3★bobobo
• Student/Professional:Student
• 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: 5

Current Ratings Graph Old Ratings Graph

1771 (+120)RatingProvisional
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June Cook-Off 2012(2012-06-18 00:25:00)

Global Rank:   109

Cheated in:   

Ratings System Update

(2012-06-18 00:25:00)

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1771 (-3)RatingProvisional
Rating i Provisional Rating, click to know more

June Cook-Off 2012(2022-12-20 00:00:00)

Global Rank:   109

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 (5)

March 2012 Challenge

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

April Challenge 2012

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

June Cook-Off 2012

Closing the Tweets, Connecting Soldiers

Total Problems Solved: 26