April Challenge 2016
Chef And Coloring, Chef And Magical Path
September Challenge 2016
Chef and digits of a number
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
May Challenge 2017
Chef and his daily routine, Median of adjacent maximum numbers, Courses in an university
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
January Challenge 2018
Maximum Score, Rectangle, Partition the numbers
India