Zakaria Mehrab

• Username: 5★ridslk22
• Country:  Bangladesh
• Student/Professional:Student
• Institution:Bangladesh University of Engineering and Technology
• 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: 24

Current Ratings Graph Old Ratings Graph

2025 (+3)RatingProvisional
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June Cook-Off 2020 Division 1(2020-06-22 00:00:00)

Global Rank:   155

Cheated in:   

Ratings System Update

(2020-06-22 00:00:00)

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2025 (-65)RatingProvisional
Rating i Provisional Rating, click to know more

June Cook-Off 2020 Division 1(2022-12-20 00:00:00)

Global Rank:   155

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 (24)

February Challenge 2016

Devu and a light discussion, Chef and Strange Operations, Chef-Detective

March Challenge 2016

Palindromic substrings, Chef And Special Dishes, maximize the sum

May Challenge 2016

Chef and Balls, Forest Gathering, Chef and Big Soccer, Laddu

June Challenge 2016

Chef And The Hiring Event, Chef and Rectangle Array, Chef and New Game, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Chef and cities, Devu and an Array

September Challenge 2016

Chef and calculation, JosephLand, Faded Palindromes, Chef and Matrix Division, Dividing Machine, Chef and Friends, Chef and digits of a number

April Cook-Off 2016

Movie Weekend, Odd Divisors

March Lunchtime 2016

Simple Statistics

January Challenge 2017

Digits Cannot Separate, Tourists in Mancunia, Reservior, Fantastic Four, Cats and Dogs, Capital Movement

February Challenge 2017

Chef and Triangles

March Challenge 2017

Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix

January Lunchtime 2017

Nothing in Common

April Challenge 2017

Similar Dishes, Bear and Clique Distances, Bear and Row 01, Stable market, Dish Of Life

June Challenge 2017

Saboteur (Challenge), A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets, Chef and Prime Queries

September Challenge 2017

Minimum Good Permutation, Little Chef and Sums, Fill The Matrix, Chef and Pick Digit, Sereja and Commands

November Challenge 2017

Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes

June Cook-Off 2017

Ada and crayons, SnackUp

June Challenge 2018 Division 1

Vision

February Challenge 2019 Division 1

Chef and Secret Ingredients

March Challenge 2019 Division 2

Chef got Recipes, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit, (Challenge) Interleaving Strings

May Challenge 2019 Division 1

Ada Rooks 2, Where to Build the Roads

May Cook-Off 2019 Division 1

Expected Xor, Searching for a Biclique, Misha and Nice Sets

May Lunchtime 2019 Division 1 (Unrated)

Grid Tour, Reverse Maximisation

June Challenge 2019 Division 1

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

June Cook-Off 2020 Division 1

Per Capita Income, Checkpoints

Total Problems Solved: 95