September Challenge 2014
Chef and Left-Right, Chef and Rainbow Array - 2, Fun with Rotation
October Challenge 2014
Remy paints the fence, Chef and Ground, DevuLand, Dinosaurs and Laddus
January Challenge 2015
Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
April Challenge 2015
Chef and Interview, Broken Telephone
May Challenge 2015
Chef and Prime Divisors, Chef and new recipe, Set Difference , Devu and binary String
June Challenge 2016
Chef And The Hiring Event, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
July Challenge 2016
Chefland and Electricity, Chef and Tetris, Andrash and Stipendium, Chef and Robots Competition
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Chef and digits of a number, Faded Palindromes
February Challenge 2017
Eugene and big number, Chef and Triangles, Chef and His Apartment Dues, Most Frequent Element, Gerrymander
March Challenge 2017
Xenny and Alternating Tasks, Bandwidth of a matrix, Bear and Extra Number, Cooking Schedule
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
May Cook-off 2018 Division 2
Best Cake Ever, Secret Recipe
June Lunchtime 2018 Division 1
Sort the Leaves, Summary Power
Mexico