M Obaydullah

• Username: 4★obaydullahmhs
• Country:  Bangladesh
• Student/Professional:Student
• Institution:Bangladesh University of Professionals
• 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

1855 (+55)RatingProvisional
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July Cook-Off 2022 Division 2 (Rated)(2022-07-03 22:30:02)

Global Rank:   152

Cheated in:   

Ratings System Update

(2022-07-03 22:30:02)

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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1855 (-191)RatingProvisional
Rating i Provisional Rating, click to know more

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

Global Rank:   152

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)

January Challenge 2019 Division 2

Distinct Pairs, Fancy Quotes, Lucky Number Game

February Cook-Off 2019 Division 2

Buying New Tablet, Chef and Party

March Challenge 2019 Division 2

Chef and Number Game, Chef and a Beautiful Digit, (Challenge) Interleaving Strings

April Challenge 2019 Division 2

Friend or Girlfriend, Maximum Remaining

April Cook-Off 2019 Division 2

Pied Piper vs Hooli, Making a Meal, Chef Learning Hungarian Algorithm

April Lunchtime 2019 Division 2

Fast Food, Attendance

July Challenge 2019 Division 2

Parity Again, Minimum and Maximum, Chef and Mean

September Mega Cook-Off 2019 Division 2

Playing with Matches

October Challenge 2019 Division 2

Phone Prices

December Challenge 2019 Division 2

Plus Multiply, Binary XOR, Easy Subsequence Selection, That Is My Score!

December Cook-Off 2019 Division 2

Change It, Purify It

April Challenge 2020 Division 2

Strange Number, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Unit GCD, Squared Subsequences, Sell All the Cars

March Cook-Off 2020 Division 1

Mysterious Sequence

March Lunchtime 2020 Division 2 (Unrated)

Maximize LCM, Chef Swaps Digits, Good Prefix

April Lunchtime 2020 Division 2

Another Birthday Present!, Positive Mex, Chef in Fantasy League

July Lunchtime 2020 Division 1

Golomb Sequence, Binary Concatenation

July Cook-Off 2022 Division 2 (Rated)

Permutation And Median, Segmentation Fault, Xor Permutation

June Long One 2022 Division 2 (Unrated)

Full Path Eraser, Reduce to zero, Divisible by i , Possible GCD, Alternate Additions, Equal Strings

October Long 2022 Division 1 (Unrated)

Chef And Array Construction, Twos and Zeros, Binary Substituition

Total Problems Solved: 110