Zhang Kai

• Username: 2★zhk
• Country:  China
• Student/Professional:Professional
• Organisation:Alibaba
• 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: 6

Current Ratings Graph Old Ratings Graph

1494 (-34)RatingProvisional
Rating i Provisional Rating, click to know more

March Challenge 2014(2014-03-18 15:00:00)

Global Rank:   3008

Cheated in:   

Ratings System Update

(2014-03-18 15:00:00)

This is the difference due to changing the rating system.This graph is not updated after 20th Dec 2022. Know more

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1494 (+23)RatingProvisional
Rating i Provisional Rating, click to know more

March Challenge 2014(2022-12-20 00:00:00)

Global Rank:   3008

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 (6)

June 2009 (Contest IV)

Product of divisors, Count the squares

February 2012 Challenge

Box and Ball System

March 2012 Challenge

Longest Weird Subsequence, Cosine Partition Function, Evil Book, Lucky Number, Free Shuttle Service, Home Delivery, Spoon in Matrix, Xor it

April Challenge 2012

Double Strings

January Challenge 2013

Three Different Numbers

March Challenge 2014

Walk

Total Problems Solved: 19