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Practice: 

ForbiddenSum, Chef and Numbers

January Challenge 2014: 

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

January Cook-off 2014: 

Chef and the Cake I

November Cook-Off 2014: 

Most Distant Points, Brackets

February Challenge 2014: 

Draughts, Make Him Happy, Longest Common Pattern, Little Elephant and Subarrays, Colored Array

March Challenge 2014: 

Sereja and Sorting 2, Team Split, Binary Tournament, Walk, Maximum number, GCD condition, Little Chef and Numbers, Mike and Stamps, A Story with Strings, Chef and Graph Queries

June Challenge 2014: 

Maxim and Progressions, Chef and Digit Jumps, Chef and Subarray, Guessing Game, Forgot Password

September Challenge 2014: 

Chef and Rainbow Array - 2, Chef and Swaps, Chef and Left-Right, Chef and sequence, Rectangle Query, Fun with Rotation, Flooring

October Challenge 2014: 

Remy paints the fence, Sereja and two strings, Chef and Ground, Chef and Square, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus

November Challenge 2014: 

Chef and Segment Game, Chef and Words, Fombinatorial, Sereja and Permutations, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, Chef and Churu, The Spelling Problem

May Challenge 2015: 

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

October Challenge 2015: 

Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Cyclic shifts in permutation, Rupsa and Equilateral Triangle, LCM equation, Jump mission

November Challenge 2015: 

Ingredients, Receipt Recovery, Chef and collection of stamps, Eugene and function, Simple Sum, Chef and cakes, Period on tree, Decompose the Tree

August Challenge 2016: 

Chef and His Garden, Fighting Ebola, Chef and Circle Run, Chef and Chocolate, Chef and Round Run, Funny gnomes, Maximum Grid, Chef and Tree, A Good Problem

October Challenge 2016: 

Sereja and Stones, Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Chef and Two String

December Challenge 2016: 

Train Partner, Kth Max Subarray, Chef and Finding Direction, Sereja and Increasing subsequence, Kirito in labyrinth, Roses for Alexey, Our Base is Under Attack, Bear and Three Colours

September Cook-Off 2016: 

Lazy Jem, The Lost Arithmetic Sequences, Counting Strings

September Lunchtime 2016: 

Chef and Inequality, Chef and Tree

January Lunchtime 2017: 

Sealing up, Nothing in Common, Segment Queries

July Challenge 2017: 

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

November Challenge 2017: 

Chef and Intersection Line, Product on the segment by modulo , Chef Hates Palindromes, Polynomials, Chef and Subarray Queries, Chef goes Left Right Left, Lovers Gift, Periodic Palindrome Construction, Villages and Tribes

Problems Authored (6)

Problems Tested (0)

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