Ruban Alexey

April Challenge 2016

Chef And Coloring, Chef and Ballons

May Challenge 2016

Laddu

September Challenge 2016

Chef and Friends, Chef and digits of a number, Faded Palindromes, Chef and calculation

October Challenge 2016

Chef and Keyboard, Chef and Three Dogs

September Cook-Off 2016

Lazy Jem

January Challenge 2017

Capital Movement, Cats and Dogs, Reservior

February Cook-Off 2017

Download file

May Challenge 2017

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

July Challenge 2017

Whats in the Name

August Long Challenge 2017

Chef and Rainbow Array

September Challenge 2017

Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums

December Challenge 2017

Total Diamonds, Chef And his Cake

March Cook-Off 2017

Safe Robot

February Challenge 2018

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

March Challenge 2018 DIV 2

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

October Mega Cook-Off 2018 Division 2

Ada and the Staircase

March Lunchtime 2018 Division 2 (Unrated)

Chef and Friends, Three Integers, Magic Elements

December Challenge 2018 Division 2

Max and Electrical Panel, Chef and An Ideal Problem, Chef and Interactive Contests, (Challenge) Delete DAG

November Challenge 2018 Division 2

Chef and Ridges, Chef and Difficult Contests, Chef and Happiness

February Challenge 2019 Division 2

Chef and Secret Ingredients, Appy and Contest

March Challenge 2019 Division 2

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

May Challenge 2019 Division 2

Reduce to One

July Challenge 2019 Division 2

Chef and Mean

Problems Authored (2)

Problems Tested (0)

No Contribution

Editorials Contributed (0)

No Contribution