February Challenge 2015
Let us play with rank list, Chef and Chain, Chef and Equality
August Challenge 2015
Gravity Guy, Cooking Machine, Aditi and Magic Trick
May Cook-Off 2015
Devu and friendship testing
August Cook-Off 2015
Chef and the Wildcard Matching
September Lunchtime 2015
Sum of palindromic numbers
February Challenge 2016
Chef and Strange Operations, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum, Chef And Special Dishes
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
June Challenge 2016
Devu and an Array, Chef And The Hiring Event, Chef and Coins Game
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior
February Challenge 2017
Chef and His Apartment Dues, Gerrymander, Chef and Triangles
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number
February Lunchtime 2017
Bear and House Queries, Bear and Milky Cookies
June Challenge 2017
Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
India