Piyush Kumar

January Cook-Off

Collision in Space

February 2012 Challenge

Lucky Long, Word Couting, Count of Maximum

March 2012 Challenge

Free Shuttle Service, Home Delivery, Spoon in Matrix

March Cook-Off 2012

Ciel Numbers I, Ciel Numbers II

April Challenge 2012

Fit to Play, Double Strings, Greatest Dumpling Fight

April Cook-Off 2012

Top Batsmen, Resistance

May Challenge 2012

Jewels and Stones, Lucky lucky number, Remember the recipe, A Home for Chef

May Cook-Off 2012

Little Elephant and Strings

June Challenge 2012

Little Elephant and Candies, Doom Bakes Cakes, Arranging Cup-cakes

July Challenge 2012

Chef's Dream, My Fair Coins, The Gray-Similar Code, Little Elephant and Bubble Sort, Gift Rift, Restaurant Rating

August Challenge 2012

Little Elephant and Bombs, Lucky Driving, Range of Data, Delivery Boy

July Cook-Off 2012

Ciel and Receipt, Ciel and Tomya

August Cook-Off 2012

Forced Output, Code Crazy Minions

September Challenge 2012

Kisses & Hugs, Chef World, Racing Horses, ChefTown Parade, Three is Crowd

October Challenge 2012

Little Elephant and Order, Fierce Battles, Event Organizer, Maximum Sub-rectangle in Matrix, The New Scheme, Need More Diamonds

October Cook-Off 2012

Buying Sweets, Tennis Tournament

November Challenge 2012

Coin Flip, Sridhar Likes Travelling

December Challenge 2012

Granama Recipes, Arigeom Beats, Book Exercises, Magic Rankings, The Uncountable Ways, Pizza Delivery, WordNinjas

January Challenge 2013

Little Elephant and Alcohol, Dividing Products, Hotel Balifornia, The Minimum Number Of Moves, End Of The World, A Fence for Byteland, Chef of the Year, Three Different Numbers

January Cook-Off 2013

Minimum Distance, Many Chefs

February 2013 Challenge

Little Elephant and Cards, Buy1-Get1, Magic Board, Climbing Stairs, Efficient Painting

February Cook-Off 2013

Lack of Logic, Row and Column Operations

March Challenge 2013

Random decreasing function, Tourist Translations, Approximately, Fire Escape Routes, Minesweeper

April Challenge 2013

Little Elephant and Music, Barcelona Gameplay Tactics, ChefGame, Kingdom Unity, Fault Tolerance, Maximum Weight Difference, Levy Conjecture

May Challenge 2013

Matchsticks, Witua and Math, Name Reduction, Your Name is Mine, Field Trip

June Challenge 2013

Little Elephant and Mouses, Collecting Magical Berries, Just Some Permutations 3, Dessert Wizard, Two k-Convex Polygons, Predictopus, To challenge or not, W String, Lapindromes

July Challenge 2013

Mountain Holidays, Galactik Football, The Probability Of Winning, Chef and Walking on the rectangle , Count K-Primes, Sereja and Sorting, Circle of death

August Challenge 2013

Little Elephant and Lemonade, Hello Hello, Save The Princess, The Number Of Solutions, Chef and Segments, Sereja and Ballons, Deleting numbers, Splitting Candies

September Challenge 2013

Little Elephant and Exams, Merciless Chef, Cool Guys, Chef and Integers , Project Spoon, CAO Stage-1, CAO Stage-2, Sereja and Snake

September Cook-Off 2013

Strange Matrix, Game, Code

October Cook-Off 2013

Polo the Penguin and the Numbers, Polo the Penguin and the Test

October Challenge 2013

Little Elephant and Bamboo, Helping Lira, Maxim and Dividers, Sereja and Transformation, CAO Stage-3, Yet Another Nice Girl, Edit Distance on Grid, Kamehameha

November Challenge 2013

Chef Game, Superpowers of 2, Yet Another Cute Girl, Sereja and Vectors, Uncle Johny, Square Digit Squares, Missing some chairs

December Challenge 2013

Cube Cakes, Chef and Codes, Funny Marbles, Magic Pairs, Reign, Rectangular Queries

December Lunchtime 2013

Mike and Matrices

January Challenge 2014

Magic Trick, Sereja and Graph, Bon Appetit, Please like me, Chef and Feedback

May Cook-Off 2014

Book Game with Chef, Divide the Cake, Ups and Downs

October Cook-Off 2014

The Army, Walk on the Axis, Mahesh and his lost array

February Challenge 2014

Little Elephant and Movies, Draughts, Make Him Happy, Chef and Favourite Sequence, Longest Common Pattern, Little Elephant and Subarrays, Colored Array, Make It Zero 2

May Challenge 2014

Little Elephant and Balloons, Sereja and Game, Compilers and Parsers, Chef-jumping, Chef and Strange Matrix, Stone

June Challenge 2014

Little Elephant and Blocks, Maxim and Progressions, Chef and Functions, Chef and Digit Jumps, Chef and Subarray, Guessing Game, Forgot Password

July Challenge 2014

Little Elephant and Painting, Garden Game, Chef and Frogs, Chef and Rectangle Genome, Count Substrings, Reach The Point, Dish Owner, Lucky Game, Game of Numbers

August Challenge 2014

Mountain Holidays 2, Sereja and Shuffling, Little Elephant and T-Shirts, Chef and Reversing, Team Sigma and Fibonacci, The Leaking Robot, Earthquake, Cleaning Tables, Chef and Gift

September Challenge 2014

Factorisation, Sereja and Bubble Sort, Chef and Rainbow Array - 2, Chef and Swaps, Chef and Left-Right, Chef and sequence, Fun with Rotation, Flooring

November Challenge 2014

Chef and Segment Game, Chef and Words, Fombinatorial, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome

December Challenge 2014

Chef Under Pressure, Chef and Bracket-Pairs, XOR with Subset, Chef and Apple Trees

July Lunchtime 2014

And Operation, Shift The String

January Challenge 2015

Queries on the String, Sereja and Number Division 2, Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries

March Challenge 2015

Count Substrings, Chef and Notebooks, Devu and his Class, Sign Wave, Matrix

May Challenge 2015

Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe

June Challenge 2015

Sereja and Matrix Division, Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Anticommutative implication, Chef and String

July Challenge 2015

Addition and Multiplication, Bread, MasterChef, Na2a and lucky stone, Chef and Cube

August Challenge 2015

Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick

September Challenge 2015

Chain of Doughnuts, Count Steps in Matrix, Bank robbery, Lighthouses

December Challenge 2015

Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence, Chef and Filters

December Cook-Off 2015

Chef and Subarrays

September Lunchtime 2015

Sum of palindromic numbers

January Long Challenge 2016

Sereja and Salesman, Chef and Inflation, Rupsa and the Game, Churu and Balls, Chef and Making Triples, Cyclist Race, Chef and Time Machine, Devu and Perfume

September Challenge 2016

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

October Challenge 2016

Chef and Keyboard, Chef and Three Dogs

December Challenge 2016

Train Partner, Kth Max Subarray, Kirito in labyrinth, Edit Distance Revisited, Roses for Alexey, Our Base is Under Attack

April Challenge 2017

Chef and Digits, Bear and Random Grid, Chef and Divisor Tree, Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes

May Challenge 2017

Chef and Sub Array , Long Sandwich , Gotham PD, Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers, Chef and Subsequences, Chef and Battleship

July Challenge 2017

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

September Challenge 2018 Division 1

AND Square Subsegments, Bad Shuffle

February Challenge 2020 Division 1

Expected Change, Long Contest and Cook Off Overlaps

April Challenge 2020 Division 1

Strange Number, Squared Subsequences, Ready Bitwise

November Challenge 2020 Division 1

Restore Sequence

March Challenge 2021 Division 2

Interesting XOR!, College Life 4, Space Arrays

August Challenge 2021 Division 2 (Unrated)

Problem Difficulties, Olympics Ranking

Problems Authored (17)

Problems Tested (0)

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Editorials Contributed (0)

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