Alex Walden

Practice: 

Prime Distance On Tree, Chef and Array, Nasty Queries

October Cook-Off 2014: 

Walk on the Axis, The Army

November Challenge 2014: 

Distinct Characters Subsequence, Chef and Segment Game, Let us construct palindrome, Chef and Red Black Tree

October Lunchtime 2014: 

Tanu and Head-bob

September Challenge 2015: 

Count Steps in Matrix

January Long Challenge 2016: 

Chef and Inflation, Rupsa and the Game, Churu and Balls, Chef and Time Machine, Devu and Perfume

September Challenge 2016: 

Chef and Friends, Chef and calculation, JosephLand, The New Restaurant, Faded Palindromes, Chef and digits of a number, Chef and Matrix Division, Dividing Machine

October Challenge 2016: 

Chef and Two String, Chef and Keyboard, Chef and Three Dogs

November Challenge 2016: 

Count Permutations, Friends Meeting, Urban Development, Gift and Chef, Chef and squares, Sereja and Ways in the Cube, Task for Alexey

December Challenge 2016: 

Our Base is Under Attack, Kirito in labyrinth, Train Partner

July Cook-Off 2016: 

Chef and Proportion, Chef and Numbers, Chef and Land, Chef and Array

January Challenge 2017: 

Capital Movement, Cats and Dogs

February Challenge 2017: 

Alice and her garden, Gerrymander, Most Frequent Element, Chef and His Apartment Dues, Chef and Triangles, Interval Game, Primitive Queries, Eugene and big number, Chef and Yoda, Chef and his Best Friend

March Challenge 2017: 

Pishty and birthday, Bandwidth of a matrix, (CH) Bear and Sorted Rows, Bear and Extra Number, Xenny and Alternating Tasks, Completing favorite game, Cooking Schedule

April Challenge 2017: 

(CH) Serejs and Billiards, Similar Dishes, Bear and Clique Distances, Bear and Row 01, Dish Of Life, Stable market, Chef and Divisor Tree, Bear and Random Grid, Chef and Digits

May Challenge 2017: 

Long Sandwich , Chef and Battleship, Chef and Subsequences, Median of adjacent maximum numbers, Blocked websites, Chef and his daily routine, Gotham PD, Chef and Sub Array , Courses in an university

June Challenge 2017: 

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

March Cook-Off 2017: 

Rainbow Graph, Yet Another Card Game, Safe Robot

May Cook-Off 2017: 

La Liga, Balanced Array, Nasty Queries

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