September Challenge 2013
CAO Stage-1, CAO Stage-2, Chef and Integers
April Challenge 2014
Sereja and Permutation, Counting Matrices, Farmer Feb, Chef and Digits, Divide the Tangerine, Shortest Path in Binary Trees
May Challenge 2014
Chef-jumping, Stone, Chef and Strange Matrix, Compilers and Parsers
October Challenge 2014
Remy paints the fence, Chef and Ground, Chef and Square, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
May Challenge 2015
Chef and new recipe, Chef and Cake, Set Difference , Devu and binary String, Devu and his three Hands, Chef and Prime Divisors
June Challenge 2015
Sereja and Matrix Division, Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Anticommutative implication, Chef and String
July Challenge 2015
Sereja and Game 2, Chef and Cube, Na2a and lucky stone, MasterChef, Bread, Addition and Multiplication
December Challenge 2017
Chef and Universe, Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Red and blue points, Chef and Hamming Distance of arrays
Thailand