June Challenge 2017
Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets, A Good Set
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers
August Long Challenge 2017
Greedy Candidates, Strings and Graphs, Palindromic Game, Chef and Mover, Chef And Fibonacci Array, Chef and Rainbow Array
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
Brazil