March Challenge 2017
Bear and Extra Number, Xenny and Alternating Tasks
January Challenge 2018
Maximum Score, Rectangle, String Merging, Partition the numbers
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid
September Lunchtime 2018 Division 2
Chef Restaurant , Match the Streams, Opposite Cites, Judging Delay
May Challenge 2020 Division 1
Buying a New String, Triple Sort
April Cook-Off 2020 Division 1
Tower Counting, The Gifting Problem, Simple Operations, Inversions in Permutations
May Cook-Off 2020 Division 1
Chef, Chefina and Their Friendship, Roads in Chefland, Chefland Squads and the Army Chief, Chefina on a Trip
April Lunchtime 2020 Division 1
Triangle Query, Positive Mex
May Lunchtime 2020 Division 1
Absolute Min Max, Escape One, Convert the String, Tree difference
June Challenge 2020 Division 1
The Tom and Jerry Game!, Danya and Different Values, Covid Sampling (Challenge), Convenient Airports, The Delicious Cake, Operations on a Tuple
July Challenge 2020 Division 1
Chefina and Swaps, Missing a Point
Brazil