Aleksejs Zajakins

November Challenge 2012

Lucky Balance, A Wonderful Chocolate, Delicious Dishes, Candy Collecting Game, Coin Flip, Jam Board, Many Left, Sridhar Likes Travelling, Arithmetic Progressions

November Cook-Off 2012

Little Elephant and Magic, Little Elephant and Permutations, Little Elephant and Divisors

December Challenge 2012

Sereja and Data Structures , Granama Recipes, Arigeom Beats, Book Exercises, Magic Rankings, Different Trips, The Uncountable Ways, Pizza Delivery, WordNinjas

December Cook-Off 2012

Expected Greatest Common Divisor, Root of the Problem, Packaging Cupcakes, Reversing directions

January Challenge 2013

Little Elephant and Alcohol, A New Door, Dividing Products, Hotel Balifornia, The Minimum Number Of Moves, End Of The World, A Fence for Byteland, Chef of the Year, Three Different Numbers

February 2013 Challenge

Little Elephant and Cards, Buy1-Get1, Magic Board, Triangular Queries, Climbing Stairs, Vacation, Observing the Tree, Word Play, Efficient Painting

February Cook-Off 2013

Lack of Logic, Row and Column Operations, End Of The World 2, Hotel Balifornia 2

March Cook-off 2013

The Ball And Cups, Palindrome, Level Of Difference

April Cook-Off 2013

Andrew and the Meatballs, Andrew and the Strings, Andrew and the Meatballs again

May Cook-off 2013

Subtraction Game 1, Subtraction Game 2

August Challenge 2013

Little Elephant and Lemonade, Music & Lyrics, Hello Hello, Save The Princess, The Number Of Solutions, Chef and Segments, Sereja and Ballons, Deleting numbers, Prime Distance On Tree, Splitting Candies

August Cook-Off 2013

Chef and The Right Triangles, Chef and The Divisibility Queries, Chef and The String of Digits

August Lunchtime 2013

Pairwise AND sum, Matrix, Sorting

September Challenge 2013

Little Elephant and Exams, Merciless Chef, Cool Guys, Chef and Integers , Project Spoon, CAO Stage-1, CAO Stage-2, Sereja and Snake

September Cook-Off 2013

Strange Matrix, Game, Tree, Code

October Cook-Off 2013

Polo the Penguin and the Lucky String, Polo the Penguin and the Numbers, Polo the Penguin and the Test, Polo the Penguin and the XOR

January Challenge 2014

Magic Trick, Counting The Important Pairs, Sereja and Graph, Counting D-sets, ForbiddenSum, Meteor, Byteland Tours, Bon Appetit, Please like me, Chef and Feedback

January Cook-off 2014

Chef and the Cake I, Subtraction Game, Interrogating Gangsters

March Cook-Off 2014

Game of Divisors, ABC-Strings, Dividing Stamps

November Cook-Off 2014

Lost Graph, Brackets, Petersen Graph

December Challenge 2014

Chef Under Pressure, Alok-nath and His Sanskars, Chef and Bracket-Pairs, Divide or die, Kali and Devtas, XOR with Subset, Chef and Apple Trees, Sereja and GCD, Good galaxy

January Challenge 2015

Queries on the String, Sereja and Number Division 2, Chef and A Large Permutation, Sereja and LCM, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Xor Queries, Ranka, Gcd Queries

January Cook-Off 2015

Suraj goes shopping, Tojo hates probabilities, Anup at Amrithapuri, Random Rudreshwar, Abhijeet and rectangles

April Cook-Off 2015

Lucky Fives, Taxi Driver, Equality, Version Control System

July Cook-Off 2015

Cops and the Thief Devu, Maximize Disjoint Pair Sum, Path containing K Nodes, Adding Special Sum, Adding Up Sequences of Towers

August Cook-Off 2015

Chef and the XORed Number , Chef and the Wildcard Matching

October Cook-Off 2015

Word Stem, Almost Sorted Permutation

November Cook-Off 2015

Sereja and Line, Sereja and Array and Subtracting, Sereja and Pairs, Sereja and Tree, Sereja and Tree 2

December Cook-Off 2015

Chef and Subarrays, Chef and Queries, Chef and LCS, Chef and Vectors

December Lunchtime 2015

Computer Network, Ancient Berland Roads, Distinct Codes

September Challenge 2016

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

January Cook-Off 2016

Chef and Destruction, Chef and Maximum Sum Matrices , Chef And Fibonacci Tree, Chef and Fruits

March Cook-Off 2016

Digital clock, Dual Nim, Alternating subarray prefix, The potato problem

April Cook-Off 2016

Movie Weekend, Odd Divisors, Queries on a Binary Tree, LCP Maximization, Bit Twister on a Tree

March Cook-Off 2017

Rainbow Graph, Yet Another Card Game, Safe Robot

July Cook-Off 2017

Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples, Chang and Beautiful Sequences, Bipartite Graph from Trees

August Cook-Off 2017

Tree Connectivity, Game on Stick, Matrix and Chef, Real obtuse, From heaven to earth

March Lunchtime 2017

Bear and Haircut, Bear and Ladder, Bear and Species

October Lunchtime 2017

Weird Competition, Optimal Subset, Buggy Calculator, Maximum Number

SnackDown 2021 - Online Qualifiers

Lucky Number

SnackDown 2021 - Online Round 1A

Yet Another Flipping Problem, Round Robin Ranks , Equal Beauty, Lazy Machine

SnackDown 2021 - Online Pre-Elimination

Non-Decreasing Subsequence of size K, Good ranking, Product Pain, Guests like slippers, Mega mu - 1, Mega mu - 2, Guess the row

SnackDown 2021 - Online Elimination Round (Rated for all)

Random Convex Hull, Graduate Work Matters, Sorting Segments

Problems Authored (16)

Problems Tested (18)

Editorials Contributed (4)