October Challenge 2017
Chef and a great voluntary Program, Chef and Cycled Cycles, Shooting on the array, Max Mex, Counter Test For CHEFSUM, A Balanced Contest, (Challenge) Connecting computers, Lucky Edge, Chef and Magic Arrays
December Challenge 2017
Chef And Easy Xor Queries, Chef and Hamming Distance of arrays, Red and blue points, Penalty Shoot-out, Chef, Leonardo And Queries, Chef And his Cake, Total Diamonds, Chef and Universe
January Challenge 2018
Killing Monsters, A humongous Query, K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
March Challenge 2018 DIV 1
Mix the Colors, Minions and Voting, Chef and Gcd Queries, Chef Cuts Tree, Chef and Interval Painting, Pishty and Triangles, Chef and Easy Problem
May Challenge 2018 Division 1
S-T Mincut, Change the Signs, Edges in Spanning Trees, Fake Binary Search, Dibs on Fibs
September Challenge 2019 Division 1
Biladerim Icin, Fuzzy Linear Combinations, Expected GCD, Chef Designed a Network
October Challenge 2019 Division 1
Bacterial Reproduction, Array Modification, Chef and Maximum Star Value, Even Edges, Queries on Matrix
November Challenge 2019 Division 1
Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, Single Point of Failure
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Scoring Pairs, Sticky Notes, Addition
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Ready Bitwise, Factor Tree
