July Challenge 2017
Chef and Sign Sequences, Pishty and tree, Multiplication Program, Tree Expectancy, Whats in the Name, Servers (Challenge), Calculator , IPC Trainers, Two Coins
August Long Challenge 2017
Palindromic Game, Flower Pots, Strings and Graphs, Greedy Candidates, Walks on the binary tree, Hill Jumping, Chef and Mover, Chef And Fibonacci Array, Chef and Rainbow Array
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Weasel does Xor on Tree, Weasel finds Staircase, Fill The Matrix, Little Chef and Sums
November Challenge 2017
Product on the segment by modulo , Villages and Tribes, Periodic Palindrome Construction, Lovers Gift, Chef and Subarray Queries, Polynomials, Chef Hates Palindromes, Chef goes Left Right Left
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
January Challenge 2019 Division 1
Yet Another Problem About Sequences, A Pizza Slice, Distinct Pairs, Partition the Graph, Different Neighbours
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, Leaked Answers (Challenge)
