Tony Zhu

• Username: 2★tony_1234_4321
• Country:  Canada
• Student/Professional:Student
• Institution:Toronto International College Canada
• CodeChef Pro Plan: No Active Plan. View Details

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Last 6 Months 2026 (Jan-Jun)2025 (Jul-Dec)2025 (Jan-Jun)

Rating Graph

No. of Contests Participated: 14

Current Ratings Graph Old Ratings Graph

1522 (-43)RatingProvisional
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Starters 224 (Rated)(2026-02-04 22:00:04)

Global Rank:   3231

Cheated in:   

Ratings System Update

(2026-02-04 22:00:04)

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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1645 (-133)RatingProvisional
Rating i Provisional Rating, click to know more

May Cook-Off 2022 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   483

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 (14)

December Lunchtime 2020 Division 2 (Unrated)

Sed Sequences

June Challenge 2021 Division 3 (Rated)

Bitwise Tuples, Summer Heat, Bella ciao

July Cook-Off 2021 Division 3

XOR-ORED, Mod Equality, Shoe Fit

July Lunchtime 2021 Division 2

Beautiful Pairs, Array Rotation Returns

August Challenge 2021 Division 2 (Unrated)

Chef and Bulb Invention, Problem Difficulties, Olympics Ranking

August Lunchtime 2021 Division 2

K-th Maximum, Just a Graph

CodeChef Starters 8 Division 2 (Unrated)

Penalty Shots

CodeChef Starters 9 Division 2 (Unrated)

Black cells in a chessboard, India Fights Corona, Bus full of passengers, Large Square

SnackDown 2021 - Online Qualifiers

Lucky Number

SnackDown 2021 - Online Round 1A

Dance Moves, Min Max LCM

SnackDown 2021 - Online Round 1B

Queens Placement

November Challenge 2021 Division 2 (Unrated)

Equal Coins

December Cook-Off 2021 Division 2

Musical Chairs

December Lunchtime 2021 Division 3

Romantic Reversals, Chef Loves 1010, Chef and Vacation Transportation , Maximum Trio

January Cook-Off 2022 Division 2

Palindromes Not Allowed, Mean Maximization

May Cook-Off 2022 Division 2 (Rated)

Doubled Distances

Starters 52 Division 2 (Unrated)

Minimum Sum, WA Test Cases, K-Flip, Flipping Failure

December Long 2022 Division 2 (Unrated)

Divisible by A_i, Gcd of Subarrays, Maximise XOR

Starters 75 Division 2 (Rated)

Equal Hamming Distance, Three Powers of Two, Prefix Ones, Chefs Favourite Function

Starters 81 Division 2 (Unrated)

Beautiful Strings, Unimodal Subsets, Distinct Matrix, Binary Ternary

Starters 112 Division 2 (Rated)

3 Logicians Walk into a Bar, Max Nutrition

Starters 142 Division 3 (Rated)

Chef loves Pizza Chef loves halfs, Penalty Shoot-out

Starters 224 (Rated)

The Coding Streak, AabBcCDd

Total Problems Solved: 57