Abdullah Al Mahin

• Username: 4★ab_mahin
• Country:  Bangladesh
• Student/Professional:Student
• Institution:University of Barisal Bangladesh
• 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: 35

Current Ratings Graph Old Ratings Graph

1802 (+39)RatingProvisional
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Starters 198 (Rated)(2025-08-06 22:00:02)

Global Rank:   132

Cheated in:   

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(2025-08-06 22:00:02)

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1629 (-1)RatingProvisional
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Starters 64 Division 2 (Rated)(2022-12-20 00:00:00)

Global Rank:   1174

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

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Learning Paths (0)

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Contests (35)

August Lunchtime 2021 Division 3

Maximum Length Even Subarray

SnackDown 2021 - Online Qualifiers

Lucky Number, Maximum Number Of Distinct Elements

CodeChef Starters 23 Division 3 (Rated)

Average of Three, Chef and Profits, Subarray Mex

March Long Two 2022, Division 3 (Rated)

Minimum Longest Substring, Chef and Races, Missing Numbers, The Rating Dilemma, Same Parity Swaps in Binary Strings

July Cook-Off 2022 Division 3 (Rated)

Permutation And Median, K-MEX, High Accuracy

Starters 45 Division 2 (Rated)

Adjacent Sum Parity

Starters 46 Division 3 (Rated)

Sort the String, MATH1 Enrolment, Group Assignment

July Lunchtime 2022 Division 3 (Rated)

The Last Levels

Starters 48 Division 3 (Rated)

Buy Lamps, Fill The Grid, Make Palindrome 2, Positive array

Starters 49 Division 3 (Rated)

N Buttons 1 Bulb, Split The String, High Frequency, Valid Minimum

Starters 51 Division 3 (Rated)

Split N, Copy and Paste, Different Medians, TV Discount, Dominant Element

Starters 53 Division 3 (Rated)

Odd Pairs, Make A and B equal, Weights

Starters 56 Division 3 (Rated)

K-Subarrays, Nearest Exit, Maximize Colours, Far Away

Starters 57 Division 2 (Unrated)

Maximum Expression, Even Splits, Two Different Palindromes

Starters 59 Division 2 (Rated)

Maximum Subarray , Suspense String, Confusing Concatenations

Starters 61 Division 2 (Rated)

Minimise LCS, Weird Subarrays, Subarray Removal

Starters 64 Division 2 (Rated)

Luigi and Uniformity, Range Assign, Number of Distinct Elements Minimize

Starters 78 Division 2 (Rated)

Bitwise Equation, Valid Expression

Starters 114 Division 2 (Rated)

Christmas Candy

Starters 115 Division 3 (Rated)

Greedy LIS Algorithm, A PLUS B Remastered, Decorating Christmas Tree, Chocolate Distribution

Starters 117 Division 2 (Rated)

Not Prime Permutation, Spell Shortening

Starters 118 Division 3 (Rated)

Subset GCD, Literacy Rate, Join States, Xorry 1

Starters 130 Division 2 (Rated)

Make Equal, Alternating Binary String

Starters 131 Division 2 (Rated)

K-Closeness, Dice Deception, T-Perm

Starters 141 Division 2 (Rated)

Redundant Array, Amphibian Escape

Starters 142 Division 2 (Rated)

Chef loves Pizza Chef loves halfs, Array Removal, Number Hunt

Starters 144 Division 2 (Rated)

Budget Allotment, Largest K

Starters 146 Division 2 (Rated till 5 stars)

Bouncing Ball, Permutation Construction, Knockout tournament

Starters 147 Division 2 (Rated till 5 stars)

Truth Teller And Liars 101, Independence Day 101, Non-Primes 101, Gold Coins 101

Starters 182 (Rated)

Bar Queue, Beautiful Garden, Palindromic Score

Starters 183 (Rated)

Complete MST, S to T, Larger Smaller, Max Triangle

Starters 184 (Rated)

One Down, Front or Back

Starters 185 (Rated)

GCD Summation, Creature Hunter

Starters 186 (Rated)

Distinct Arrays , Jump A or B, Approval Ratings, Mod and Make Y

Starters 187 (Rated)

OR What, Incremental Game, Distinct Representations

Starters 193 (Rated)

Mex Tree (Min), Add Permutation, Check Odd Even Divisors, Count Odd Even Divisors

Starters 198 (Rated)

Currency Exchange, Leave no Witnesses, Minimize Maximum Mex

Total Problems Solved: 209