Alexander

Practice: 

Prime Generator, Chef and Direction, Saboteur (Challenge), Courses in an university, Chef and Battleship, Euler Sum, Protecting The Poison, Consecutive Snakes, Team Formation For Snackdown, A temple of Snakes, Is It a Snake, Walks on the binary tree, Bipartite Graph from Trees, Good Pairs, Travel to all Points, Divide the Set, Flower Pots, Chef and Dancing Steps, Chef and Math Test, Bridge Crossing, Chef, Leonardo And Queries, Vaibhav and Ministers, Xor Table, Grammar Distance, Spectacular Activity Selection, Election Bait

June Challenge 2017: 

Chef and Prime Queries, Persistent oak, Pairwise union of sets, Triplets, Xenny and Coin Rankings, Cloning, A Good Set, Saboteur (Challenge), Chef and the Feast

July Challenge 2017: 

Servers (Challenge), Two Coins, IPC Trainers, Calculator , Whats in the Name, Tree Expectancy, Pishty and tree, Chef and Sign Sequences

August Long Challenge 2017: 

Chef and Rainbow Array, Flower Pots, Strings and Graphs, Greedy Candidates, Mathison and the Data Warehouse (Challenge), Palindromic Game, Walks on the binary tree, Hill Jumping, Chef and Mover, Chef And Fibonacci Array

September Challenge 2017: 

Little Chef and Sums, Fill The Matrix, Weasel does Xor on Tree, Minimum Good Permutation, Chef and Pick Digit, Sereja and Commands, Sum of Cubes

October Challenge 2017: 

Chef and Horcrux, Lucky Edge, (Challenge) Connecting computers, A Balanced Contest, Counter Test For CHEFSUM, Max Mex, Shooting on the array, Chef and Cycled Cycles, Chef and a great voluntary Program, Chef and Magic Arrays

November Challenge 2017: 

Chef Hates Palindromes, Villages and Tribes, Periodic Palindrome Construction, Lovers Gift, Chef goes Left Right Left, Chef and Subarray Queries, Polynomials, Product on the segment by modulo , Chef and Intersection Line

December Challenge 2017: 

Chef and Direction, Chef and Universe, Total Diamonds, Santa Delivering Problem, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Red and blue points, Chef and Hamming Distance of arrays

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Problems Tested (0)

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