Cheng Wan

• Username: 6★greatwall1995
• Country:  China
• Student/Professional:Student
• Institution:Shanghai Jiao Tong 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: 7

Current Ratings Graph Old Ratings Graph

2236 (-48)RatingProvisional
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July Challenge 2016(2016-07-13 15:00:00)

Global Rank:   1534

Cheated in:   

Ratings System Update

(2016-07-13 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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2236 (+169)RatingProvisional
Rating i Provisional Rating, click to know more

July Challenge 2016(2022-12-20 00:00:00)

Global Rank:   1534

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 (7)

May Challenge 2013

Witua and Math, Tree Counting, Password Cracking Challenge, Juno Puzzle for May, Name Reduction, Your Name is Mine, Field Trip, Matchsticks

August Challenge 2013

Hello Hello, Splitting Candies, Prime Distance On Tree, Deleting numbers, Sereja and Ballons, Chef and Segments, The Number Of Solutions, Save The Princess, Music & Lyrics, Little Elephant and Lemonade

August Challenge 2014

Chef and Gift, Cleaning Tables, Earthquake, Chef and Reversing, Little Elephant and T-Shirts, Mountain Holidays 2, The Leaking Robot

November Challenge 2014

Chef and Segment Game, Chef and Words, Fombinatorial, Sereja and Permutations, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome

December Challenge 2014

XOR with Subset, Sereja and GCD, Chef and Apple Trees, Chef and Bracket-Pairs, Chef Under Pressure

July Challenge 2015

Addition and Multiplication, Maximum Difference Walk, Sereja and Game 2, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles

July Challenge 2016

Andrash and Stipendium, Chef and Tetris, Chefland and Electricity

Total Problems Solved: 49