QINGCHUAN ZHANG, 张晴川

• Username: 7★sam__2
• Country:  China
• Student/Professional:Student
• Institution:University of Auckland New Zealand
• 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: 13

Current Ratings Graph Old Ratings Graph

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Coders' Legacy (Rated for all)(2020-07-16 00:15:00)

Global Rank:   4

Cheated in:   

Ratings System Update

(2020-07-16 00:15:00)

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Coders' Legacy (Rated for all)(2022-12-20 00:00:00)

Global Rank:   4

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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Contests (13)

December Challenge 2018 Division 2

Colorblind Feast, (Challenge) Delete DAG, Chef and An Ideal Problem, Chef and Interactive Contests, Chef and Meatballs, Directing Edges, Max and Electrical Panel, Chef and Interactive XOR

December Lunchtime 2018 Division 2

Print Pattern, Choosing from Buckets, Drawing Lines, Maximize the NOSS, Find Best Path, Age Calculator

January Challenge 2019 Division 1

(Challenge) Chef and Matching Game, A Pizza Slice, Fancy Quotes, Chef and Modulo Game, Party, Distinct Pairs, Lucky Number Game, Partition the Graph, Different Neighbours, Yet Another Problem About Sequences, Maximum Distance

Plinth-Enigma'19 LNMIIT Techfest - (Rated for all)

Sherlock and His Device, Summation over nCr, Ross goes for Shopping, Return of the Gargoyle King, Shops in Mirzapur, XOR! Wait for it

February Challenge 2019 Division 1

Art of Balance

May Challenge 2019 Division 1

Ada Rooks 2, Trees and Degrees, Reduce to One, Chef and Elephant Tree, Where to Build the Roads, Ada Pawns

May Cook-Off 2019 Division 1

Searching for a Biclique, Nearest Color, Expected Xor, Misha and Nice Sets, Bitsetbaba and Power Grid

May Lunchtime 2019 Division 1 (Unrated)

Grid Tour, Reverse Maximisation

June Challenge 2019 Division 1

(Challenge) SnackDown 99, Forgotten Tree 9, Sum and GCD, Intersecting Paths, Chef and His Dish, Chef and Ingredients, Count Arrays, Lent Money

June Lunchtime 2019 Division 1

The Grux Permutation , Gii and His Club, Igzi and Burly Array, Ivan Pesic and His World Tour

July Cook-Off 2019 Division 1

Birthday Gift Again, War in Treeland Again, Magical Menu, Expected Product

July Lunchtime 2019 Division 1 (Unrated)

Delete a Subarray, Two-lane Road, Professor on a Trip

UWCOI 2020 (Rated for all)

Button Pairs, Base Plans, Find maximum in an Array, Blocks, Mercury Poisoning

RECode 12.0 (Rated for all)

Chef and Or, Chef and Numbers, Chef and Subsequences, Chef and Rotation, Chef and Walk, Chef and String

Coders' Legacy (Rated for all)

Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift, Perry learns Binary, Unique Substring

Total Problems Solved: 159