Nika Skybytska

July Challenge 2017

Chef and Sign Sequences, Whats in the Name, Calculator

June Cook-Off 2017

Ada and crayons, SnackUp

June Lunchtime 2017

Maximum Unique Segment, Two Numbers

March Challenge 2018 DIV 2

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

March Cook-off 2018 Division 1

Chef Goes to the Cinema, Chef Restores a Matrix

March Lunchtime 2018 Division 1 (Unrated)

Three Integers, Magic Elements

April Challenge 2018 Division 1

Chef and Array (Challenge), Vaibhav and Ministers, Chef at the Food Fair, Cutting Plants, Highway Crossing, Chef and Same Old Recurrence, Count Good Prefixes, Average of Pairs, Workers

ALKHWARIZM (Rated)

Help Voldemort, Sam, The Charming Angel

Code Melange (Rated)

XD Subsequences, The Deadly Sin, Candy Love

January Challenge 2019 Division 1

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

February Challenge 2019 Division 1

Chef and Secret Ingredients, Art of Balance

March Challenge 2019 Division 2

Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit

March Lunchtime 2019 Division 2

Corrupted Seven-Segment Display, Testing Robot, Pogo Stick Competition

June Challenge 2019 Division 1

Lent Money, Chef and Ingredients, Sum and GCD

January Challenge 2020 Division 1

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

April Challenge 2020 Division 1

Strange Number, Squared Subsequences, Ready Bitwise, Unit GCD, Sell All the Cars, COVID Pandemic and Long Queue

May Challenge 2020 Division 1

Coronavirus Spread, Isolation Centers

ENIGMA - PLINTH'20 LNMIIT (Rated for all)

Corruption in Freedonia, Gru is Handing Out Bananas, Minion AND Range, Recruit Villagers

July Lunchtime 2020 Division 1

Binary Concatenation

January Challenge 2021 Division 1

Chef and Ants, Guess the Tiling, Expected Number of SCCs, Watching CPL, Fair Elections, Chef and Division 3, Point Of Impact, Encoded String

January Cook-Off 2021 Division 1

Mex Subsequence

January Lunchtime 2021 Division 1 (Unrated)

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

February Challenge 2021 Division 1

Frog Sort, Team Name, Another Tree with Number Theory, Chef and Meetings, Prime Game, XOR Sums, Maximise Function, Highest Divisor

May Cook-Off 2021 Division 1

Permutation Swaps, Falling Zero, Double Burgers

May CodeChef Starters 2021 Division 1 (Unrated)

Cheating Time, Minimum Popping, Subtree Center, Plagiarism, Lazy Chef, Correct Sentence

June Challenge 2021 Division 1 (Unrated)

Bitwise Tuples, Bella ciao, Summer Heat

June CodeChef Starters 2021 Division 1 (Unrated)

Total Correct Submissions, Sleep Cycle, Flappy Bird, Chess Match, Chef and Queries, Cyclic Quadrilateral

CodeChef Starters 12 Division 1 (Unrated)

K - balanced string, Good Weather, Make it Divisible, Another Shortest Paths Problem, Maximum Points, The Minimum Game

CodeChef Starters 16 Division 1 (Unrated)

Professor And Directions, Chef And Salary Pay, K - Magical String, Chef and Magical Steps, Subarray Sum, Pass or Fail

CodeChef Starters 21 Division 1 (Unrated)

Devendra and Water Sports, Akash and Grid, ChefWM, And Or Union, Covid and Theatre Tickets, Mean equals Median, The Melancholy of Problem Setter

Exun 2021-22 Division 1 (Unrated)

Vishesh and his Popcorn Combo, Sarthak and his Magic Grid, Vedant and his Hidden Array

CodeChef Starters 23 Division 1 (Unrated)

Average of Three, Chef and Profits, Subarray Mex, Maximise the Minimum, Maximising Vacations, Non Zero Subarray Xor

CodeChef Starters 28 Division 1 (Unrated)

Counting Pairs, Chef and Instant Noodles, Travelling in the Graph, Permutation Xority, Self Defence Training, Car Choice, Qualify the round, Count the Holidays

CodeChef Starters 29 Division 1 (Unrated)

String protocol, Plusle and Minun on Array, Triple Sundae, Fill the Bucket, Tyre problem, Increase 2 consecutive characters, Decomposition Reaction, Binary OP, Max Heat, Bomb the base

CodeChef Starters 30 Division 1 (Unrated)

Squeeze OR, Minimum Coloring, Maximizing LIS, Gift Shop and Coupon, Chef and Water Bottles, Swapping Chefs Way, Prefix Suffix Operations, Chef and Chocolates, Unbalanced Reversals, Balanced Reversals

CodeChef Starters 31 Division 1 (Unrated)

Pile Partition, Xor Travellers, XOR and AND, Alternating String, Sign Moves, Cup Finals, Mexy Array, The Unchanging OR, Group Assignment, Economics Class

CodeChef Starters 32 Division 1 (Unrated)

Maximize the Minimum, Binary String Cost, LR Shirts, Volume Control, Finding Shoes, Training Plans, Two Merchants, Flip Sorting, Avoid Alternating, Course Registration

April Cook-Off 2022 Division 1

Chef Goes Shopping, Sorted Distances

CodeChef Starters 33 Division 1 (Unrated)

Max BIT Sum, Stable Mex, Distinct Dilemma, Broken Life, The Cheaper Cab, Monthly Budget, Minimum Cars required, Non Adjacent Flips, Make Them Equal

April Long One 2022 Division 1 (Unrated)

Dazzling GCD Pair, Prime Sum, Dazzling AXNODR Challenge , Ezio and Guards, Min Max Equality, The Cooler Dilemma 1, The Cooler Dilemma 2, Pairwise Xors

CodeChef Starters 34 Division 1

Binary Mismatch, Average Array, Binary String Xor, Count The Arrays, Is the Score Consistent, Good Quality Bulbs, Positive Products, Lulymp, Expiring Bread, Good Permutation

April Lunchtime 2022 Division 1(Rated)

Modular Circular Permutations, Do Not Touch the MEX!!!, Secret Machine Mania

Starters 35 Division 1 (Unrated)

Jump to Sibling, Dark Light, Chef Find XOR Beautiful, Concurrent Lines, Admins and Shopping, Water Requirement, Police and Thief, Jenga Night

May Cook-Off 2022 Division 1 (Rated)

Different Subarrays Rearrange, Triple Inversions

Starters 37 Division 1 (Unrated)

Remove Balance, Dazzling Even-Odd Challenge, The Mango Truck, Roller Coaster, Beat the Average, Laptop Recommendation , Infernos, Maximum OR Minimum, Too Mean, Prefix XORs

May Long One 2022 Division 1 (Unrated)

Pushpa , Sugarcane Juice Business, Football Cup, Miami GP

Starters 38 Division 1 (Unrated)

Chef gives Party, Get Subscription, Good Pairs, Average Gift, Anti-knapsack, Dominant Army, Circular Track

Starters 39 Division 1 (Unrated)

Compress the Video, Crazy Substrings, Minimize Blocked Roads, Yet Another Palindromic Problem, Closest Vowels, Recent contest problems, My very 1st contest!, Even Subarray XOR, A or B, Chess Ratings

Starters 41 Division 1 (Unrated)

Equal Integers, Chef and Brain Speed, Chef and Chocolates, Remove and Add, Is this priority or parity!, Path Parity, Determine the Winner

Starters 73 Division 1 (Rated till 6-Stars)

Minimum OR Path, Find an integer, Consecutive Xor, First To Last, Hamiltonian Tree, Elevators

Starters 74 Division 1 (Rated till 6-Stars)

Candies, Maximum Xor Sum, Distinct Values, Power Tree, Lcm hates Gcd, Medicine Strength, Minimal Inversions

Starters 75 Division 1 (Rated till 6-Stars)

Chefs Favourite Function, Minimum Replacement, Xor X,Get MAX, Equal Hamming Distance, Prefix Ones

Starters 76 Division 1 (Rated till 5-Stars)

Bitwise Operations on Circle, Make Array Odd, Expected Value, Counting Is Fun, Construct Array, Not Divisible

February Cook-Off 2023 Division 1 (Rated)

Take Not Less, Alice Potter and OWL, Alice Potter And Dumbledore Army

Starters 79 Division 1 (Rated till 5 Stars)

Add smallest prime factor, Distinct Opposite Sums, Better Deal, Ageing

Starters 94 Division 1 (Rated till 5 Stars)

The Gift, Gymkhana Election IIIT-A, Place The Number, CodeChef Streak, Possible or Not, Search for 404, Special Operation, The Vowel Matrix, Rank Queries

Starters 95 Division 1 (Rated till 6 Stars)

Boxes, Transfusion Chain, Break This Array

Starters 96 Division 1 (Rated till 5 Stars)

Swap the numbers, Remove Stones, Zero Array, Mex Array, Remove Multiples, Absolute Differences, Bells of Pilgrimage, Weeding, AB Difference

Starters 97 Division 1 (Rated till 6 Stars)

Make It Special, Unreachability Cost, No Palindrome, Triplets Min

Starters 115 Division 1 (Rated)

Subtraction Sequence I, Greedy LIS Algorithm, Binary Grid Forces, Make All Zero

Starters 116 Divison 1 (Rated till 6-Stars)

Chef Product, Hattrick, ORST , Permutation Sort, Minimum Wage, Exact Savings, Access Control

Starters 117 Division 1 (Rated till 5-Stars)

Equality Etiquette, Spread Spree, Stingy Arrays, Go Away, Goose!, Not Prime Permutation, Roads and Flights, Weapon Choice, Spell Shortening, Yearly Phone

Starters 118 Division 1 (Rated till 5-Stars)

Subset GCD, Count Substrings, Literacy Rate, International Education Day!, Join States, Is it uniquely decodable, Xorry 2, Xorry 1

Starters 119 Division 1 (Rated till 6-Stars)

K Odd Sum, Xorred, Unalike Gcd & Lcm, Guess Who Delivers

Starters 120 Division 1 (Rated till 6 Stars)

Find Permutation , Minimum Operations, Construct Permutation, Count Subarrays, Count Arrays, Largest K, Valentines Contest, Sub or Swp, Valentine Gifts

Starters 121 Division 1 (Rated till 6-Stars)

Frequal, Colourful Balls, Split And Maximize, Escape, Caesar Cipher Lite, Magic Palindrome

Starters 122 Division 1 (Rated till 6-Stars)

Healthy Sleep, Problem Reviews, Arya In Grid, Transformation Cost, Matrix Modulo, Cursed, Elf on the Shelf, Man of the Match

Starters 123 Division 1 (Rated till 6-Stars)

Minimum And Maximum I, Yet Another Alice Bob Game, Minimum And Maximum II

Starters 125 Division 1 (Rated till 6-Stars)

Bucket Game, Manhattan Xor, Operating on A, Binary Minimal

Starters 126 Division 1 (Rated till 6 Stars)

Tree Distance Set, Freedom, LCD, Triangular Swaps

Starters127 Division 1

Array Operations, Expected Components, Purify It, ABC Conjecture, Anti-Triangle

Starters 128 Division 1 (Rated till 6-Stars)

Binary Substring, XOR And Multiply, Moody Chef, MEXimize the Array, Disjoint Non-Decreasing Array, Reach 5 Star, Defeating Monsters

Starters 129 Division 1 (Rated till 5-Stars)

Palindromic Substrings, Red Blue Decomposition, Football Training, Pep Bidding, Ballon d Or, ConstructXor, SumXor

Starters 132 Division 1 (Rated till 6 Stars)

ALIEN-OR, Optimal Flip, Random Array, Change Please, ICE CREAM, Goodness Over Good, MEX QUERIES , Prime Query, GAME 11

Starters 133 Division 1 (Rated till 6-Star)

ABC Conjecture 3, Powered Parameters, Fireworks, Too Far For Comfort (Easy Version)

Starters 134 Division 1 (Rated till 6-Stars)

Count Good RBS, Origin, Morning Run, Prison Escape, Money Double, Rock Paper Scissors, 3out1in

Starters 138 Division 1 (Rated till 6-Stars)

A power B mod C , TRIPLE PRIMES, K Subarray Products, Prefix Suffix Inequality, Breezy Mode Problem, Heat Wave, Long Drive, Distinct Substring

Starters 139 Division 1 (Rated till 5-Stars)

Sort Perm, Sum of N, Maximum Distance Permutations, Distribute Cookies, Destroying Bridges Part 2, Television Channels

Starters 141 Division 1 (Rated till 5-Stars)

Possible Contender, Redundant Array, Amphibian Escape, Nearly Equal, Lucky Clover, Perfect Prefixes

Starters 142 Division 1 (Rated till 5-Stars)

Sum of Xors, Pairs Sum with Length x, The Cards Machine, Chef loves Pizza Chef loves halfs, Writing Speed, Penalty Shoot-out, Array Removal, Number Hunt

Starters 143 Division 1 (Rated till 5-Stars)

Non-Divisor Array, Max Min and Length, Binary Conversion, International Justice Day, Maximum Coins

Starters 145 Division 1 (Rated till 6-Stars)

Beautiful Array, Make Bob Win , Volume Comparison, Querified, Gun Master, Make My Array Equal, Square String

Starters 146 Division 1 (Rated till 5 stars)

Back Front, Connect The Chains, Bouncing Ball, Permutation Construction, Knockout tournament, No Winner, Olympics 2024

Starters 149 (Rated till 5 stars)

Kill Monsters (Hard Version), Magical World, Easy Subarray Sum, Maximise Sum, Chef Loves Beautiful Strings (Hard Version), Approximate Answer, Chef Loves Beautiful Strings (Easy Version), Kill Monsters (Easy Version)

Starters 167 (Rated till 5 stars)

Alternate Universe, Temperature Balance, Happy New Year!, Lottery Tickets, Sum Over Subarrays, Delete Not Equal, Grid Construction (Even), Grid Construction (Odd)

Starters 168 (Rated till 6 stars)

No Two Alike, Can You Bench, Binary Removals, Xoperations, Equate XOR, Make Odd, Big Achiever

Starters 180 (Rated till 6 star)

Balls and Boxes, Shall we play a game, Array Operations, Huh, Easy, Maximum Ones, Counting Problem, CodeMat

Starters 181 (Rated for all)

Costly Swapping, The Best Matrix, Tree Colouring (Hard), Tree Operations (Easy), Flip Prefix

Starters 182 (Rated till 5 star)

IPL, Bar Queue, MasterChef, Minimize the Sum, Beautiful Garden, Palindromic Score

Starters 183 (Rated till 6 star)

Swap Permutation 1, Arbitrary Shuffling, Complete MST, S to T

Problems Authored (2)

Problems Tested (11)

Editorials Contributed (0)

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