Ahasan Kabir

• Username: 4★ahasan_1999
• Country:  Bangladesh
• Student/Professional:Student
• Institution:Chittagong University of Engineering & Technology, Bangladesh
• 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: 30

Current Ratings Graph Old Ratings Graph

1994 (-17)RatingProvisional
Rating i Provisional Rating, click to know more

September Cook-Off 2021 Division 1(2021-09-20 00:30:00)

Global Rank:   173

Cheated in:   

Ratings System Update

(2021-09-20 00:30:00)

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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1994 (-44)RatingProvisional
Rating i Provisional Rating, click to know more

September Cook-Off 2021 Division 1(2022-12-20 00:00:00)

Global Rank:   173

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 (30)

July Cook-Off 2018 Division 2

Encoding Message

August Challenge 2018 Division 2

Spell Bob

November Challenge 2018 Division 2

Chef and Happiness, Chef and Difficult Contests

August Lunchtime 2018 Division 2

Chef and Problem Setting, Chef and Eid

February Cook-Off 2019 Division 2

Buying New Tablet, Chef and Party

December Lunchtime 2019 Division 2

The Evil Professor, Stupid Machine, Check Algorithm, Guess the number

April Cook-Off 2020 Division 2

Matrix Decomposition, Lift Requests, Simple Operations

May Cook-Off 2020 Division 1

Chef, Chefina and Their Friendship, Chefina on a Trip, Roads in Chefland

February Lunchtime 2020 Division 2

Secret Mission, Swapping to Palindrome, Not All Flavours, At the Gates

March Lunchtime 2020 Division 2 (Unrated)

Chef Swaps Digits, Good Prefix

August Challenge 2020 Division 1

Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements

July Lunchtime 2020 Division 1

Binary Concatenation

August Cook-Off 2020 Division 1

Red-blue Trees, Polygon Relationship

August Lunchtime 2020 Division 1

Game on a Strip

June Cook-Off 2020 Division 1

Per Capita Income, Checkpoints

January Cook-Off 2021 Division 1

Mex Subsequence

January Lunchtime 2021 Division 1 (Unrated)

Even Sum, Dreams of Divisibility, Good Grid, Shifting Spoons

October Cook-Off 2020 Division 1

Path-etic Sums

November Cook-Off 2020 Division 1

Flip the String, Chef and IPC Certificates, Hiring Workers

October Lunchtime 2020 Division 2

AND Plus OR, Chef and Subtree MEXs, Chef Likes Good Sequences, Cute Chef Gift

September Cook-Off 2020 Division 2

Maximise Subsequence Value, Bulbs and Wires, Bowling Strategy

September Lunchtime 2020 Division 1

Root the Tree

UWCOI 2021 (Rated for all)

Array Swaps, Hidden Numbers

February Lunchtime 2021 Division 1

Independent Set, Average Sorting, Sed Max

April Cook-Off 2021 Division 1

Tree Distances, OR of ANDs

May Cook-Off 2021 Division 1

Permutation Swaps, Double Burgers

May Lunchtime 2021 Division 1

Total Components, K-Subarrays

July Lunchtime 2021 Division 1

Longest Good Segment

September Cook-Off 2021 Division 1

Half Sequence, Fake Swaps

SnackDown 2021 - Online Qualifiers

Lucky Number, Maximum Number Of Distinct Elements, Minimise Difference

SnackDown 2021 - Online Round 1A

Round Robin Ranks , Dance Moves, Equal Beauty, Min Max LCM

CodeChef Starters 20 Division 1 (Unrated)

Stable Sequence

Total Problems Solved: 109