robert1003

• Username: 4★robert1003
• Country:  Taiwan
• Student/Professional:Other
• 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: 27

Current Ratings Graph Old Ratings Graph

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April Challenge 2021 Division 2(2021-04-12 15:00:02)

Global Rank:   2803

Cheated in:   

Ratings System Update

(2021-04-12 15:00:02)

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1893 (+67)RatingProvisional
Rating i Provisional Rating, click to know more

April Challenge 2021 Division 2(2022-12-20 00:00:00)

Global Rank:   2803

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 (27)

September Challenge 2019 Division 2

Easy Fibonacci, Biladerim Icin, Fuzzy Linear Combinations, Doofish Set, Chef Designed a Network, Chef and Interesting Subsequences , Chef and Good Subsequences

September Mega Cook-Off 2019 Division 2

Two Groups, Playing with Matches

September Lunchtime 2019 Division 1

Chef Feeds Cats, All Substrings, Ice Cream Queue, Treeversion, Find the Sum

October Challenge 2019 Division 1

Phone Prices, Array Modification, Chef and Maximum Star Value

October Mega Cook-Off 2019 Division 1

D-Or

October Lunchtime 2019 Division 1 (Unrated)

Box Game

November Challenge 2019 Division 1

Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, A Simple Game

November Cook-Off 2019 Division 1

The Biggest Restaurant, The Challenge Day

November Lunchtime 2019 Division 1

Planting Trees, Washing Windows

December Cook-Off 2019 Division 1

Xor It

December Lunchtime 2019 Division 1

The Evil Professor, Guess the number

December Challenge 2019 Division 1

Test Generation, Addition, (Challenge) Cubical Virus, Binomial Fever, Sticky Notes, Chefina and Ranges, Binary XOR

January Challenge 2020 Division 1

Chef and Dynamo, Doraemon

February Challenge 2020 Division 1

Expected Change, No Change Required, Long Contest and Cook Off Overlaps

March Challenge 2020 Division 1

Lasers Everywhere

April Challenge 2020 Division 1

Strange Number

May Challenge 2020 Division 1

Triple Sort

January Cook-Off 2020 Division 1

Range AND, Chefina and Sums

February Cook-Off 2020 Division 1

Must Be Divisible, Maximum Subsequence Sum, XOR Game

March Cook-Off 2020 Division 1

Escape the Tree , Random Chocolates, Mysterious Sequence, Maximize Letter Beauty

April Cook-Off 2020 Division 1

Simple Operations

May Cook-Off 2020 Division 1

Chef, Chefina and Their Friendship

January Lunchtime 2020 Division 1

Construct Array, Under the Tunnels, Folding Paper

February Lunchtime 2020 Division 1

Swapping to Palindrome, Secret Mission

April Lunchtime 2020 Division 1

Triangle Query, Positive Mex

July Challenge 2020 Division 1

Chefina and Swaps, Missing a Point, Doctor Chef

January Cook-Off 2021 Division 2

Not Too Colourful, Prime Tuples, Maximise Islands

April Challenge 2021 Division 2

Worthy Matrix, Chef and Dice

Total Problems Solved: 102