Robin Zhang

• Username: 5★robinz62
• Country:  United States
• Student/Professional:Professional
• Organisation:Trading Firm
• 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

2013 (+65)RatingProvisional
Rating i Provisional Rating, click to know more

February Cook-Off 2022 Division 1(2022-02-21 22:30:00)

Global Rank:   68

Cheated in:   

Ratings System Update

(2022-02-21 22:30:00)

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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2013 (-284)RatingProvisional
Rating i Provisional Rating, click to know more

February Cook-Off 2022 Division 1(2022-12-20 00:00:00)

Global Rank:   68

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)

October Lunchtime 2016

The Largest Bouquet

July Cook-Off 2018 Division 2

Encoding Message, OR Matrix

August Cook-Off 2018 Division 1

Mixi Game

August Challenge 2018 Division 2

Spell Bob, Sheokand and Number, Problem Sort, Modular GCD, Coordinate Compression

July Lunchtime 2018 Division 2

Split Stones, Forced Particles

April Challenge 2019 Division 1

Offer for Chef, Kira Loves Palindromes, Playing with Numbers, Subtree Removal

September Challenge 2019 Division 1

Fuzzy Linear Combinations, Chef Designed a Network, Biladerim Icin

January Challenge 2020 Division 1

Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English, Chefland Army, (Challenge) Building Anthills

May Lunchtime 2020 Division 1

Convert the String, Tree difference

August Lunchtime 2020 Division 1

Game on a Strip, Counting Graphs, Alien Invasion

SnackDown 2021 - Online Qualifiers

Lucky Number, Minimise Difference, Maximum Number Of Distinct Elements

SnackDown 2021 - Online Round 1A

Round Robin Ranks , Dance Moves, Min Max LCM

SnackDown 2021 - Online Round 1B

Insider Subsequences, Queens Placement , Largest Laddu, Help Nishant

SnackDown 2021 - Online Pre-Elimination

Product Pain

Code: Nium Challenge

Alphabet Difference, Divide Students Into Classes, Queries in an Array

January Long 2022 - II, Division 1 (Unrated)

Sum and OR, Crying Colours, Tree Master, Power Sum

January Lunchtime 2022 Division 1

Permutation XOR Sum

February Long 2022 - I, Division 1 (Unrated)

Random OR, Digit Multiplication By K, Binary Base Basics, Bitwise Blend, Remove Adjacent

February Cook-Off 2022 Division 1

Xor Becoming Uncanny, Perfect Permutation, PerMEXuation , Mango Market

February Long 2022 - II, Division 1 (Unrated)

Sequence GCD, Bitwise swaps, Xor Palindrome

Total Problems Solved: 80