Hasin Rayhan Dewan Dhruboo

March Challenge 2016

maximize the sum, Palindromic substrings, Chef And Special Dishes

April Challenge 2016

Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring

July Challenge 2016

Andrash and Stipendium, Chefland and Electricity

August Challenge 2016

Chef and Chocolate, Chef and Round Run

September Challenge 2016

Chef and digits of a number, Faded Palindromes, Chef and calculation

July Lunchtime 2016

Drumpf for President!, Lumpy - The Bus Driver

March Challenge 2017

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

May Challenge 2017

Chef and Sub Array

June Challenge 2017

A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets

July Challenge 2017

Calculator , IPC Trainers

August Long Challenge 2017

Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs

December Challenge 2017

Chef And Easy Xor Queries, Chef and Universe

July Lunchtime 2017

Find the Maximum Value

March Challenge 2018 DIV 2

Pishty and Triangles, Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas

August Cook-Off 2018 Division 2

GukiZ and Candies, Mixi Game, Balsa For The Three

April Challenge 2018 Division 2

Cutting Plants

August Challenge 2018 Division 2

Modular GCD

September Challenge 2018 Division 2

Bad Shuffle, Table Game, Chef and Adventures, Magician versus Chef, AND Square Subsegments, War of XORs

February Challenge 2019 Division 1

Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Art of Balance

August Challenge 2019 Division 1

Guddu and his Mother, Chef and Gordon Ramsay, Maximize an Expression, Dilemma, Encoding

September Challenge 2019 Division 1

Fuzzy Linear Combinations, Expected GCD, Doofish Set, Chef Designed a Network

Problems Authored (9)

Problems Tested (0)

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Editorials Contributed (0)

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