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• Username: 6★liujunhao
• Country:  China
• Student/Professional:Student
• Institution:Peking University
• 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: 12

Current Ratings Graph Old Ratings Graph

2323 (-13)RatingProvisional
Rating i Provisional Rating, click to know more

SnackDown 2021 - Online Elimination Round (Rated for all)(2021-12-13 16:30:00)

Global Rank:   175

Cheated in:   

Ratings System Update

(2021-12-13 16:30:00)

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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2323 (+101)RatingProvisional
Rating i Provisional Rating, click to know more

SnackDown 2021 - Online Elimination Round (Rated for all)(2022-12-20 00:00:00)

Global Rank:   175

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 (12)

September Challenge 2016

Dividing Machine, Chef and Matrix Division, Chef and digits of a number, Faded Palindromes, JosephLand, Chef and calculation, Chef and Friends

March Challenge 2017

Cooking Schedule, Completing favorite game, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix

February Cook-Off 2017

Chairs, Cooking Game, Mixing flavors, Download file

February Lunchtime 2017

Bear and House Queries, Bear and Milky Cookies, Bear and Bribing Tree, Bear and Oveflow Points

April Challenge 2017

Chef and Digits, Chef and Divisor Tree, Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes

June Challenge 2017

Triplets, Pairwise union of sets, Xenny and Coin Rankings, Cloning, A Good Set, Chef and Prime Queries, Chef and the Feast

August Long Challenge 2017

Strings and Graphs, Greedy Candidates, Palindromic Game, Hill Jumping, Chef and Mover, Chef And Fibonacci Array, Chef and Rainbow Array

March Cook-Off 2017

Rainbow Graph, Yet Another Card Game, Increasing Xor Sequence, Safe Robot

March Lunchtime 2017

Bear and Haircut, Bear and Ladder, Bear and Species

April Lunchtime 2017

Bear and Digit Virus, Bear and Segment 01, Bear and Segments

May Lunchtime 2017

Prefix Inversions

April Challenge 2018 Division 1

Vaibhav and Ministers, Cutting Plants, Highway Crossing, Count Good Prefixes

SnackDown 2021 - Online Qualifiers

Lucky Number

SnackDown 2021 - Online Round 1A

Round Robin Ranks , Min Max LCM, Equal Beauty, Dance Moves, Yet Another Flipping Problem

SnackDown 2021 - Online Pre-Elimination

Non-Decreasing Subsequence of size K, Product Pain, Guests like slippers

SnackDown 2021 - Online Elimination Round (Rated for all)

Graduate Work Matters, Sorting Segments

Total Problems Solved: 82