Rafael Castro

• Username: 5★rafaelcs
• Country:  Brazil
• Student/Professional:Student
• Institution:Universidade Federal de Goiás
• 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: 33

Current Ratings Graph Old Ratings Graph

2036 (+12)RatingProvisional
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Starters 51 Division 2 (Rated)(2022-08-10 23:00:02)

Global Rank:   147

Cheated in:   

Ratings System Update

(2022-08-10 23:00:02)

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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2036 (+48)RatingProvisional
Rating i Provisional Rating, click to know more

Starters 51 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   147

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)

None

Contests (33)

October Challenge 2017

Max Mex, A Balanced Contest

November Challenge 2017

Chef goes Left Right Left, Villages and Tribes

December Challenge 2017

Chef and Universe, Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays

January Challenge 2018

K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers

February Challenge 2018

Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome

February Cook-Off 2018

Chef and Cook-Off, Chef and Tuples, Chef and Line

April Challenge 2018 Division 1

Chef and Array (Challenge), Cutting Plants, Highway Crossing, Count Good Prefixes

May Challenge 2018 Division 1

S-T Mincut, Change the Signs, Fake Binary Search, Dibs on Fibs

July Challenge 2018 Division 1

Reach Equilibrium, No Minimum No Maximum, Gears

August Challenge 2018 Division 1

Coordinate Compression , Modular GCD, Lonely Cycles

September Challenge 2018 Division 1

Table Game, Bad Shuffle

December Challenge 2018 Division 1

Max and Electrical Panel, Chef and Interactive XOR

November Challenge 2018 Division 1

Appy Loves One, Good Median, Magician versus Chef 2

October Challenge 2018 Division 1

Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard

July Lunchtime 2018 Division 1

Forced Particles

ProCon 2018 (Rated for all)

The Great Run, Kill them with your success, Awkward Pairs

Encoder (Rated for Division 2)

Knight Chess, Second Largest Element, Paint the Wall

December Lunchtime 2018 Division 1

Choosing from Buckets, Age Calculator

January Challenge 2019 Division 1

Yet Another Problem About Sequences, Different Neighbours, Distinct Pairs, A Pizza Slice

February Challenge 2019 Division 1

Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Art of Balance, Maximize the Tax

March Challenge 2019 Division 1

Chef and Soccer, Cheating on Queue, Yet Again a Subarray Problem

April Challenge 2019 Division 1

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

June Challenge 2019 Division 1

Lent Money, Chef and Ingredients, Intersecting Paths, Sum and GCD

July Challenge 2019 Division 1

Hit the Coconuts, Guess the Prime!, Codechef War, Circular Merging

July Cook-Off 2019 Division 1

Birthday Gift Again

August Challenge 2019 Division 1

Guddu and his Mother, Encoding, Dilemma, Maximize an Expression, Chef and Gordon Ramsay

October Challenge 2019 Division 1

Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification

December Cook-Off 2019 Division 1

Xor It

December Challenge 2019 Division 1

Chefina and Ranges, Binary XOR, Sticky Notes, Test Generation, Addition

February Challenge 2020 Division 1

Chef and Railway Stations, No Change Required, Long Contest and Cook Off Overlaps

July Challenge 2020 Division 1

Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef

February Challenge 2021 Division 2

Frog Sort, Team Name, Prime Game, Maximise Function

March Challenge 2021 Division 2

Interesting XOR!, Dense Graph, College Life 4, Consecutive Adding, Paparazzi Gennady, Space Arrays, Maximum Topological Sort

April Challenge 2021 Division 2

Binary String MEX, Tree Permutations, Worthy Matrix, Destroy the EMP Chip, Chef and Dice, Boolean Game

September Challenge 2021 Division 2 (Unrated)

Minimize Digit Sum

Starters 51 Division 2 (Rated)

Prefix Suffix And Or, Split N, Copy and Paste, Different Medians

Total Problems Solved: 131