Богдан Пастущак

July Challenge 2017

Chef and Sign Sequences, Pishty and tree, Tree Expectancy, Whats in the Name, Calculator , IPC Trainers

August Long Challenge 2017

Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates

September Challenge 2017

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

October Challenge 2017

Max Mex, Counter Test For CHEFSUM, A Balanced Contest

November Challenge 2017

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

July Cook-Off 2017

Chang and Bitwise OR, Chang and the Perfect Function

August Cook-Off 2017

Matrix and Chef, Real obtuse, From heaven to earth

September Cook-Off 2017

Infinite OR Game, Statistics Construction, Subsequence Equality

November Cook-Off 2017

Skiing, Online Chess, Random Pair

February Challenge 2018

Broken Clock, Chef And His Characters, Chef And The Patents, Points Inside A Polygon, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome

February Cook-Off 2018

Chef and Cook-Off, Chef and Tuples, Chef and Line

February Lunchtime 2018

Game with numbers, Jumping in the hills

March Challenge 2018 DIV 1

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

March Cook-off 2018 Division 1

Chef Goes to the Cinema, Chef Restores an Array, Chef Restores a Matrix

April Cook-off 2018 Division 1

Run Direction, Binary Nim

July Cook-Off 2018 Division 1

Sticks, OR Matrix, Chef and GCD Game

March Lunchtime 2018 Division 1 (Unrated)

Partitions, Three Integers, Magic Elements

April Challenge 2018 Division 1

Chef and Array (Challenge), Vaibhav and Ministers, Cutting Plants, Highway Crossing, Chef and Same Old Recurrence, Count Good Prefixes

May Challenge 2018 Division 1

Fake Binary Search, Dibs on Fibs

August Challenge 2018 Division 1

Modular GCD

July Lunchtime 2018 Division 1

GCD Sum, Prime divisors

Insomnia 2018 (Rated)

Split Sums, Strange Swaps

Coders' Legacy 2018 (Rated)

Useless Clocks, Fibonacci String

January Challenge 2019 Division 1

Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, A Pizza Slice

January Cook-Off 2019 Division 1

Ada School, Ada Matrix

Plinth-Enigma'19 LNMIIT Techfest - (Rated for all)

XOR! Wait for it, Return of the Gargoyle King, Ross goes for Shopping, Summation over nCr, Jake and His Halloween challenge, Sherlock and His Device

January Lunchtime 2019 Division 1

Distances, Wanderer, Rooks

March Challenge 2019 Division 1

Chef and Soccer, Cheating on Queue, Perfect Tree Problem, Treasure Hunt, Yet Again a Subarray Problem, Matchable Permutations, (Challenge) Interleaving Strings

March Cook-Off 2019 Division 1

XOR N-bonacci Sequence, Markers and Caps, Music Shopping

Coders' Legacy 2019 (Rated for all)

Bathwater, Tennis, IPL and RCB, Up for a Game

April Challenge 2019 Division 1

Kira Loves Palindromes, Playing with Numbers, Subtree Removal, Moving Rectangles (Challenge)

April Lunchtime 2019 Division 1

Dream Problem, Firdavs and Planet F, Minimum Sum, Chef Rami and Inventions

July Cook-Off 2019 Division 1

Birthday Gift Again, War in Treeland Again

August Challenge 2019 Division 1

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

October Challenge 2019 Division 1

Even Edges, Chef and Maximum Star Value, Fun with Lists, Array Modification

November Lunchtime 2019 Division 1

Planting Trees, Washing Windows, Perfection, Servers

December Cook-Off 2019 Division 1

Xor It, Crash It

December Lunchtime 2019 Division 1

The Evil Professor, Frequency Function, Guess the number

December Challenge 2019 Division 1

Chefina and Ranges, Binary XOR, Binomial Fever, Scoring Pairs, Sticky Notes, Test Generation, (Challenge) Cubical Virus, Addition

Alkhwarizm (Rated for all)

Weirwood Trees, Danny Wants To Know

Code Melange (Rated for all)

Misplaced Signs, Greg and Grid, A Small Array, Go Round, Some Impact, Longest Xommon Subsequence, Max power

January Challenge 2020 Division 1

Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English, Chefland Army, (Challenge) Building Anthills

February Challenge 2020 Division 1

Chef and Railway Stations, Expected Change, No Change Required, Chef and Gordon Ramsay 2, (Challenge) Raisins, Long Contest and Cook Off Overlaps

March Challenge 2020 Division 1

Chef and DAG, Break, Winning Ways 2, Lasers Everywhere, Inverse of a Function, Lasers Everywhere Alternative, Egg-free DAG

May Challenge 2020 Division 1

Triple Sort, Sorting Vases, Chef and Rainbow Road, Chef and Bitwise Product, (Challenge) Nanobots

February Cook-Off 2020 Division 1

Must Be Divisible, Maximum Subsequence Sum, XOR Game, Chef and Pepperoni Pizza Again

March Cook-Off 2020 Division 1

Mysterious Sequence, Maximize Letter Beauty, Random Chocolates, Escape the Tree

ENIGMA - PLINTH'20 LNMIIT (Rated for all)

Banana String, Corruption in Freedonia, Gru is Handing Out Bananas, Gru and his Robbery of Mars, Minion AND Range, Is it Sorted or Not, That is the Question, Recruit Villagers

International Coding Marathon (Rated for all)

Lavanya Loves DFA, Are These Equal, Conservative Graph, Mr Pr in a Dilemma , Is This JEE

UWCOI 2020 (Rated for all)

Button Pairs, Find maximum in an Array, Blocks, Mercury Poisoning

July Lunchtime 2020 Division 1

Binary Concatenation

August Lunchtime 2020 Division 1

Game on a Strip, Counting Graphs, Alien Invasion

RECode 12.0 (Rated for all)

Chef and String, Chef and Walk, Chef and Rotation, Chef and Or, Chef and Subsequences, Chef and Numbers

October Cook-Off 2020 Division 1

Path-etic Sums, Yet Another Crossover Episode

October Lunchtime 2020 Division 1

Chef Likes Good Sequences, Chef Is Just Throwing Random Words, Counting Spaghetti, Cute Chef Gift

Coders' Legacy (Rated for all)

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

SnackDown 2021 - Online Qualifiers

Lucky Number

SnackDown 2021 - Online Round 1A

Yet Another Flipping Problem, Round Robin Ranks , Dance Moves, Min Max LCM

June Long One 2022 Division 1 (Unrated)

Full Path Eraser, Expected move, Reduce to zero, Add By Permutation, Divisible by i , Possible GCD

Starters 116 Divison 1 (Rated till 6-Stars)

Chef Product, Two Set Game, ORST , Permutation Sort, Exact Savings

Starters 120 Division 1 (Rated till 6 Stars)

Find Permutation , Construct Permutation, Count Subarrays, Count Arrays

Problems Authored (4)

Problems Tested (0)

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Editorials Contributed (1)