July Challenge 2016
Chef and Segments, Andrash and Stipendium, Chefland and Electricity, Chef and special numbers, Chef and Robots Competition
August Challenge 2016
Chef and Circle Run, Chef and Chocolate, Chef and Round Run, Funny gnomes, Maximum Grid
September Challenge 2016
Chef and Matrix Division, Chef and calculation, JosephLand, The New Restaurant, Faded Palindromes, Chef and digits of a number, Dividing Machine, Chef and Friends
October Challenge 2016
Big Queries, Chef and Three Dogs
August Lunchtime 2016
Product of Diameters, Studying Alphabet
October Lunchtime 2016
FastFood Combos, The Largest Bouquet, The Counties
February Challenge 2017
Most Frequent Element, Gerrymander, Chef and His Apartment Dues, Chef and Triangles, Interval Game, Eugene and big number
January Cook-Off 2017
Matrix Transformation, Digit Longest Increasing Subsequences 2
February Cook-Off 2019 Division 2
Max Range Queries, Chef and Secret Password, Buying New Tablet, Chef and Party
Belarus