June Challenge 2015
Steady tables, Sereja and Matrix Division, Chef and String, Anticommutative implication, Another Fibonacci, Chef and Polygons, Chef and Memory Limit, Chef and His Friend
January Long Challenge 2016
Sereja and Salesman, Chef and Inflation, Cyclist Race
February Challenge 2016
Chef and Strange Operations
September Challenge 2016
Dividing Machine, JosephLand
October Challenge 2016
Fenwick Iterations, Chef and Two String
June Challenge 2017
Pairwise union of sets, Chef and the Feast
June Lunchtime 2017
Maximum Unique Segment, Two Numbers, Company and Club Hierarchies
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging
August Challenge 2019 Division 2
Football, Distribute Apples
August Cook-Off 2019 Division 2
Rich Substrings, Chef Drinks Coke, Chef and Pepperoni Pizza
September Mega Cook-Off 2019 Division 2
Angry Grandfather, Two Groups, Playing with Matches
Exun Programming Prelims 2019 (Rated for all)
Weird Modulo Problem , Tennis Tournament, Chipped Tree, Yet Another Partition Problem
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