Pankaj Devesh

Practice: 

Transform the Expression, Small factorials, Enormous Input Test, Turbo Sort, ATM, Life, the Universe, and Everything, A Very Easy Problem!, Nuclear Reactors, Ciel and A-B Problem, Fit to Play, Little Elephant and Bombs, Closing the Tweets, Coin Flip, Recipe Reconstruction, Tourist Translations, Buying Sweets, Packaging Cupcakes, Snape and Ladder, Row and Column Operations, Maximum Weight Difference, Your Name is Mine, Lapindromes, Attic Crossing, Splitting Candies, Chef and The Right Triangles, Factorisation, Number Mirror, Magic Pairs, Chef and Feedback, Farmer Feb, Chef and String, Chef and Remissness, Dividing Stamps, Divide the Cake, Stone, Count Substrings, Online Transaction, Sum Queries, Tanu and Head-bob, Chef and easy problem, Walk on the Axis, Good Joke!, Fit Squares in Triangle, Piece of cake, Lucky Four, Andrash and Stipendium, Devu and Grapes, Add Two Numbers, Find Remainder, First and Last Digit, Smallest Numbers of Notes, Sum of Digits, Reverse The Number, Helping Chef, Valid Triangles, Second Largest, Finding Square Roots, The Block Game, Make XOR zero, Train Partner, Greedy puppy, Forgotten Language, Minimum Maximum, Mahasena, Chef-Detective, Processing a string, Chef and Subarrays, Crazy Malvika discovers Crazy Fibonacci function, Chef and digits of a number, Puppy and Sum, Chef And Coloring, Movie Weekend, Cats and Dogs, Coins And Triangle, VCake, Collisions, One more weird game, Studying Alphabet, Help Lost Robot!, Download file, Chef and his Students, Extreme Encoding, Nothing in Common, Bear and Ladder, Bear and Candies 123, Bear and Segment 01, A Good Set, Snake Procession, Temple Land, A temple of Snakes, Is It a Snake, SnackUp, Snakes, Mongooses and the Ultimate Election, Whats in the Name, Calculator , Little Chef and Sums, Subsequence Equality, Ninjas in a cake, Football Match, Life Limited, Chef and Sum, Chef and Dynamo, Breaking Bricks

Past ZCO Problems: 

Video Game, Tournament, Variation, Smart Phone

April Challenge 2017: 

Dish Of Life, Bear and Row 01, Similar Dishes

May Challenge 2017: 

Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers

June Challenge 2017: 

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

July Challenge 2017: 

Calculator

November Challenge 2017: 

Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes

December Challenge 2017: 

Chef And his Cake, Penalty Shoot-out

June Cook-Off 2017: 

Ada and crayons, SnackUp

October Cook-Off 2017: 

Chef and Employment Test, Chef and Weird Queries

June Lunchtime 2017: 

Two Numbers

September Lunchtime 2017: 

Chef and Cook-Off Contests

May LoC Competitive Programming Marathon: 

Bond And Fond

LoC June 2017: 

Harry and magical number, Kth Character, The Riddler

January Challenge 2018: 

K-Concatenation, Maximum Score, Rectangle, Partition the numbers

LoC Sep 2017: 

Chef on a trip, Coconut Production

CodeChef Coding Competition: 

life and everything, print_codechef, Largest Number formed from an Array

February Challenge 2018: 

Chef And His Characters, Car-pal Tunnel, Permutation and Palindrome

March Challenge 2018 DIV 2: 

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

September Mega Cook-Off 2018 Division 2: 

Make a Permutation, ATM Machine

September Challenge 2018 Division 2: 

Magician versus Chef, War of XORs, Chef and Adventures, Bad Shuffle

November Challenge 2018 Division 2: 

Chef and Difficult Contests, Chef and Happiness, Magician versus Chef 2, Appy Loves One, Chef and Ridges

October Challenge 2018 Division 2: 

Appy and Balloons , Minimize Digitsum, Chef and Serves, Byte to Bit, Chef and Circles

September Lunchtime 2018 Division 2: 

Judging Delay

InfInITy 2k18: 

Skip It!, The Ego Stone, Simple Series

January Challenge 2019 Division 2: 

Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, (Challenge) Chef and Matching Game, A Pizza Slice

February Challenge 2019 Division 1: 

Guess It Right, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars, Manhattan Rectangle

August Challenge 2020 Division 1: 

Smallest KMP

September Challenge 2020 Division 2: 

Chefina and Swap, A Problem on Sticks, Find XOR, Ada Matrix, Coronavirus Spread 2

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