chetal

Practice: 

Distant Relatives, Sereja and Salesman, Sereja and Two Lines, Sign Wave, Chef and Inflation, Matrix Maximum Sum, Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring

August Challenge 2012: 

Little Elephant and Bombs

January Challenge 2015: 

Chef and Stones

February Challenge 2015: 

Chef and Chain, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Chef and Equality

March Challenge 2015: 

Chef and Notebooks

April Challenge 2015: 

Chef and Interview, Chef and Piano Scales, Broken Telephone, Count Sequences

May Challenge 2015: 

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

May Challenge 2016: 

Laddu, Chef and Big Soccer, Forest Gathering, Chef and Balls

June Challenge 2016: 

Chef and Rectangle Array, Chef and New Game, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array, Chef And The Hiring Event

July Challenge 2016: 

Andrash and Stipendium

Past ZCO Problems: 

Video Game, Variation, Smart Phone, Tournament

May Challenge 2017: 

Chef and Sub Array , Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers

June Challenge 2017: 

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

July Challenge 2017: 

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

August Long Challenge 2017: 

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

September Challenge 2017: 

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

October Challenge 2017: 

A Balanced Contest, Counter Test For CHEFSUM, Max Mex, Chef and a great voluntary Program, Chef and Cycled Cycles

November Challenge 2017: 

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

August Lunchtime 2017: 

Mathison and the Dynamo shuffle, Mathison and pangrams

KoderKombat '17: 

Wingardium Leviosa, Walk on a tree

NPL Qualifier: 

Group of Socks, Count The Valleys

February Cook-Off 2018: 

Chef and Cook-Off

National Computing Contest 2018: 

MAGIC BOXES

March Challenge 2018 DIV 2: 

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

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