July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
April Lunchtime 2016
Maximum K Sums, Coins And Triangle
October Challenge 2017
Max Mex, A Balanced Contest
May Challenge 2018 Division 2
Xor Again, Mighty Friend, Minimum Deletions
November Challenge 2018 Division 2
Chef and Difficult Contests
September Lunchtime 2018 Division 2
Judging Delay, Chef Restaurant
January Challenge 2019 Division 2
Distinct Pairs, Fancy Quotes, Lucky Number Game
June Challenge 2019 Division 2
Chef and Proxy, Guddu on a Date
February Challenge 2020 Division 2
The Theatre Problem, School of Geometry, Hard Cash
Vietnam