Xiaohan Mao

• Username: 4★mxh1999
• Country:  China
• Student/Professional:Student
• Institution:Zhenhai High School, China
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

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

Rating Graph

No. of Contests Participated: 3

Current Ratings Graph Old Ratings Graph

1859? (+332)RatingProvisional
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July Challenge 2015(2015-07-13 15:00:00)

Global Rank:   263

Cheated in:   

Ratings System Update

(2015-07-13 15:00:00)

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1859? (-6)RatingProvisional
Rating i Provisional Rating, click to know more

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

Global Rank:   263

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 (3)

March Challenge 2015

Count Substrings, Chef and Notebooks, Chef and Problems, Sereja and Random Array, Random Number Generator, Devu and his Class, Sign Wave, Matrix, Counting on a Tree

May Challenge 2015

Special Economic Zone

July Challenge 2015

Addition and Multiplication, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles

Total Problems Solved: 36