Raihan Ruhin

• Username: 5★raihanruhin
• Country:  Bangladesh
• Student/Professional:Student
• Institution:Jahangirnagar University Dhaka, Bangladesh
• CodeChef Pro Plan: No Active Plan. View Details

Submissions Heat Map

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

Rating Graph

No. of Contests Participated: 18

Current Ratings Graph Old Ratings Graph

2068 (-21)RatingProvisional
Rating i Provisional Rating, click to know more

September Mega Cook-Off 2015(2015-09-21 00:00:00)

Global Rank:   465

Cheated in:   

Ratings System Update

(2015-09-21 00:00:00)

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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2068 (+160)RatingProvisional
Rating i Provisional Rating, click to know more

September Mega Cook-Off 2015(2022-12-20 00:00:00)

Global Rank:   465

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 (18)

April Challenge 2013

Maximum Weight Difference

May Challenge 2013

Matchsticks, Witua and Math, Password Cracking Challenge, Name Reduction, Your Name is Mine, Field Trip

May Cook-off 2013

Subtraction Game 1

October Cook-Off 2013

Polo the Penguin and the Test

October Challenge 2013

Helping Lira, Kamehameha, Edit Distance on Grid, Yet Another Nice Girl, CAO Stage-3, Sereja and Transformation, Maxim and Dividers, Little Elephant and Bamboo

January Challenge 2014

Byteland Tours, Chef and Feedback, Please like me, Bon Appetit, Meteor, Sereja and Graph, Magic Trick

February Challenge 2014

Little Elephant and Movies, Draughts, Make Him Happy, Longest Common Pattern, Little Elephant and Subarrays, Colored Array, Make It Zero 2

March Challenge 2014

Team Split, A Story with Strings, Mike and Stamps, Little Chef and Numbers, Walk, Binary Tournament

June Challenge 2014

Forgot Password, Guessing Game, Chef and Digit Jumps, Chef and Subarray, Chef and Functions, Maxim and Progressions, DARTS501

July Challenge 2014

Little Elephant and Painting, Garden Game, Chef and Frogs, Chef and Rectangle Genome, Count Substrings, Reach The Point, Dish Owner

August Challenge 2014

Mountain Holidays 2, Chef and Gift, Cleaning Tables, Earthquake, The Leaking Robot, Chef and Reversing, Little Elephant and T-Shirts, Sereja and Shuffling

September Challenge 2014

Factorisation, Fun with Rotation, Chef and sequence, Chef and Left-Right, Chef and Swaps, Chef and Rainbow Array - 2

October Challenge 2014

Remy paints the fence, Chef and Ground, Chef and Painting, Chef and Square, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus

November Challenge 2014

Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, The Spelling Problem

September Mega Cook-Off 2015

Forgotten Language, Stacks

Total Problems Solved: 80