February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bandwidth of a matrix, Bear and Extra Number, (CH) Bear and Sorted Rows
April Challenge 2017
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
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
July Challenge 2017
Whats in the Name, Calculator , Chef and Sign Sequences
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
April Cook-Off 2017
Bear and Candies 123, Bear and AB
September Cook-Off 2017
Statistics Construction, Subsequence Equality
December Lunchtime 2017
Days in Month, Strange Function
January Challenge 2018
K-Concatenation, Partition the numbers, String Merging, Rectangle, Maximum Score
March Challenge 2018 DIV 2
Minion Chef and Bananas, A Big Sale, Minions and Voting, Chef and Glove, Mix the Colors, Chef and Easy Problem
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Chef and Difficult Contests, Chef and Happiness
December Lunchtime 2018 Division 2
Print Pattern, Choosing from Buckets, Age Calculator
India