April Challenge 2017
Bear and Random Grid, Chef and Divisor Tree, Stable market, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes, (CH) Serejs and Billiards
May Challenge 2017
Chef and his daily routine, Chef and Battleship, Chef and Subsequences, Median of adjacent maximum numbers, Blocked websites, Courses in an university, Chef and Sub Array
June Challenge 2017
Xenny and Coin Rankings, Triplets, Chef and the Feast, Saboteur (Challenge), Chef and Prime Queries, A Good Set
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
December Challenge 2017
Penalty Shoot-out, Chef and Hamming Distance of arrays, Chef And his Cake, Total Diamonds
April Cook-Off 2017
Bear and Candies 123, Bear and AB
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
IOPC 2017 (Rated)
The Birthday Tears, Max Out
Russia