May Challenge 2017
Chef and Sub Array , Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
January Challenge 2018
Rectangle, String Merging, Maximum Score, K-Concatenation
January Cook-Off 2018
Multiple of 3, Survive in ChocoLand
May Cook-off 2018 Division 1
Difficult Choice, Best Cake Ever
July Challenge 2018 Division 1
No Minimum No Maximum, Gears
December Cook-Off 2019 Division 2
Change It, Purify It, Xor It
June Cook-Off 2020 Division 1
Per Capita Income, Checkpoints
Colombia