Shahadat Hossain Shahin

May Challenge 2015

Chef and new recipe

July Challenge 2015

Na2a and lucky stone, Chef and Cube

August Challenge 2015

Cooking Machine

October Challenge 2015

Count Subarrays, Who dares to be a millionaire, Rupsa and Equilateral Triangle

March Challenge 2016

Palindromic substrings

April Challenge 2016

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

June Challenge 2016

Chef And The Hiring Event

April Challenge 2017

Chef and Divisor Tree

May Challenge 2017

Long Sandwich , Blocked websites

August Long Challenge 2017

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

December Cook-Off 2017

Beautiful Array, Football Match

December Lunchtime 2017

Days in Month, Strange Function, Too Much Sweetness

February Challenge 2018

Chef And His Characters, Permutation and Palindrome, Points Inside A Polygon, Chef And The Patents

March Challenge 2018 DIV 1

Pishty and Triangles, Chef and Easy Problem, Chef and Gcd Queries, Mix the Colors, Minions and Voting

March Challenge 2019 Division 1

Yet Again a Subarray Problem, Treasure Hunt

April Challenge 2019 Division 1

Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal

April Cook-Off 2019 Division 1

Doubly Increasing Path, Random Game, Pied Piper vs Hooli

October Challenge 2019 Division 1

Chef and Maximum Star Value, Array Modification, Bacterial Reproduction, Even Edges

April Challenge 2020 Division 1

Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, Leaked Answers (Challenge)

May Challenge 2020 Division 1

Buying a New String, Chef and Bitwise Product, Chef and Rainbow Road, Sorting Vases, Triple Sort, Not a Real World Problem

March Cook-Off 2020 Division 1

Mysterious Sequence, Maximize Letter Beauty, Escape the Tree

March Lunchtime 2020 Division 1 (Unrated)

Maximize LCM, Strip in a Tree!

May Lunchtime 2020 Division 1

Convert the String, Tree difference

June Cook-Off 2020 Division 1

Per Capita Income, Checkpoints, Banned Quotient

Coders' Legacy (Rated for all)

Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift

Problems Authored (3)

Problems Tested (0)

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Editorials Contributed (0)

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