March Challenge 2015
Chef and Notebooks, Count Substrings, Matrix, Sign Wave, Devu and his Class, Sereja and Random Array, Embedding, Chef and Problems, Random Number Generator
April Challenge 2015
Division of Lands, Devus and their voting system, Black-white Board Game, Little Party, Chef and Piano Scales, Inversion sorting, Broken Telephone, Chef and Interview, Chef and Array, Count Sequences
May Challenge 2015
Special Economic Zone, Counting on a directed graph, Chef and Cake, Shopping, Chef and Balanced Strings, Set Difference , Chef and Prime Divisors, Devu and binary String, Devu and his three Hands, Chef and new recipe
June Challenge 2015
Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Another Fibonacci, Anticommutative implication, Chef and String
July Challenge 2015
Addition and Multiplication, Rohith and Circles, Chef and Cube, Na2a and lucky stone, MasterChef, Bread, Sereja and Game 2, Maximum Difference Walk
March Lunchtime 2015
Saving a gift of love, Painting the Boxes, Chef Anup, No Unpaired Chefs
Japan