Mugurel-Ionut Andreica

October Challenge 2012

Team Formation, Little Elephant and Order, Fierce Battles, Event Organizer, Maximum Sub-rectangle in Matrix, Blade Master, The New Scheme, Need More Diamonds

September Cook-Off 2012

Pizza Tossing, Prime Permutations, Recipe Reconstruction, Carvans, Coal Scam

October Cook-Off 2012

Buying Sweets, Tennis Tournament

November Challenge 2012

Lucky Balance, A Wonderful Chocolate, Delicious Dishes, Candy Collecting Game, Coin Flip, Jam Board, Martial Arts, 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

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, Cucumber Boy and Cucumber Girl, Chef of the Year, Three Different Numbers

February 2013 Challenge

Little Elephant and Cards, Buy1-Get1, Room Corner, 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, Hotel Balifornia 2

March Challenge 2013

Little Elephant and Colored Coins, Peaceful Calculator, Random decreasing function, Tourist Translations, Longest Article, Festivals, Approximately, Making Change, Fire Escape Routes, Minesweeper

March Cook-off 2013

The Ball And Cups, Palindrome, Traveling Plan, Level Of Difference

April Challenge 2013

Little Elephant and Music, Barcelona Gameplay Tactics, ChefGame, Kingdom Unity, Fault Tolerance, Maximum Weight Difference, String Query, Levy Conjecture, Cylinder, Inverse Binomial Coefficient

May Challenge 2013

Matchsticks, Witua and Math, Tree Counting, Queries on tree again!, Chef Protection Plan, Password Cracking Challenge, Juno Puzzle for May, Name Reduction, Your Name is Mine, Field Trip

June Challenge 2013

Little Elephant and Mouses, Collecting Magical Berries, Just Some Permutations 3, Dessert Wizard, Two k-Convex Polygons, Count Special Matrices, Predictopus, To challenge or not, W String, Lapindromes

May Cook-off 2013

XOR Sum, Subtraction Game 1, Subtraction Game 2, Sequence Transmission

July Challenge 2013

Across the River, Needles and Pins, Mountain Holidays, Galactik Football, The Probability Of Winning, Furik and Rubik and Sub Array, Chef and Walking on the rectangle , Count K-Primes, Sereja and Sorting, Circle of death

July Cook-off 2013

Chopsticks, Compressed String, A Plus B Again!, Counting The Acute Triangles

Lunch Time July 2013

Cooking dishes, Paying optimally, Optimal Trip, Entangled Strings

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 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, To Queue or not to Queue, Two Roads, Sereja and Snake

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, Polo the Penguin and the Tree

October Lunchtime 2013

Girl Friend and String Gift, Combinatorial Numbers, Exponential Game, Chefs in Queue

November Challenge 2013

Chef Game, Superpowers of 2, Gangsters of Treeland, Yet Another Cute Girl, Sereja and Vectors, Queries With Points, Uncle Johny, Square Digit Squares, Missing some chairs, Black and White Tree

December Challenge 2013

Lucy and the Flowers, Art in Digital Age, Cube Cakes, Chef and Codes, Petya and Sequence, Funny Marbles, Magic Pairs, Reign, Rectangular Queries, Query on a tree VI

January Cook-off 2014

Chef and the Cake I, Chef and the Orders, Subtraction Game, Interrogating Gangsters

February Cook-Off 2014

Chef and Remissness, Chef and Kingship, Chef of The Ancient, Chef and Uniqueness, Chef and Reunion

March Cook-Off 2014

Game of Divisors, ABC-Strings, XOR Minimization, 3-Palindromes, Dividing Stamps

April Cook-Off 2014

Snape and Ladder, BiCo Gaming Grid, Travelling Chef Problem, Distant Relatives

May Cook-Off 2014

Substrings and Repetitions, Book Game with Chef, Divide the Cake, Ups and Downs

June Cook-Off 2014

Where the Wild Things Are, Counting Flags, Knapsack Problem, Painting, Idols and Fans

July Cook-Off 2014

Copy-Paste, Present for Andrii, Sum Queries, Tree Again, Friends

August Cook-Off 2014

Tree Game, Permutation Shuffle, Shooting

October Cook-Off 2014

The Dirty Path, The Army, Walk on the Axis, Mahesh and his lost array

November Cook-Off 2014

Lost Graph, Most Distant Points, Brackets, Petersen Graph

December Cook-Off 2014

Servers, Jam, Matrix Again, Player, Good Joke!

February Challenge 2014

Little Elephant and Movies, Draughts, Make Him Happy, Chef and Favourite Sequence, Graph Challenge, Count on a Treap, Longest Common Pattern, Little Elephant and Subarrays, Colored Array, Make It Zero 2

March Challenge 2014

Sereja and Sorting 2, Team Split, Binary Tournament, Walk, Maximum number, GCD condition, The Street , Little Chef and Numbers, Mike and Stamps, A Story with Strings, Chef and Graph Queries

April Challenge 2014

Final Battle of Chef, Sereja and Permutation, Counting Matrices, Farmer Feb, Cards, bags and coins, Chef and Digits, Divide the Tangerine, Make It Zero 3, Chef and Tree Game, Shortest Path in Binary Trees

May Challenge 2014

Little Elephant and Balloons, Sereja and Game, Compilers and Parsers, Dynamic Trees and Queries, Chef-jumping, Fun with AGp, Sereja and Subsegment Increasings, Chef and Strange Matrix, The Malaysian Flight Search, Stone

June Challenge 2014

Little Elephant and Blocks, Maxim and Progressions, Chef and Functions, Chef and Digit Jumps, DARTS501, Chef and Subarray, Sereja and Arcs, Two Companies, Guessing Game, Forgot Password

July Challenge 2014

Little Elephant and Painting, Garden Game, Chef and Frogs, Sereja and Equality, Chef and Rectangle Genome, Count Substrings, Reach The Point, Dish Owner, Lucky Game, Game of Numbers

August Challenge 2014

Mountain Holidays 2, Sereja and Shuffling, Little Elephant and T-Shirts, Chef and Reversing, Team Sigma and Fibonacci, The Leaking Robot, Push the Flow!, Earthquake, Cleaning Tables, Chef and Gift

September Challenge 2014

Factorisation, Sereja and Bubble Sort, Chef and Rainbow Array - 2, Chef and Swaps, Chef and Left-Right, Chef and sequence, Fibonacci Numbers on Tree, Rectangle Query, Fun with Rotation, Flooring

November Challenge 2014

Chef and Segment Game, Chef and Words, Fombinatorial, Sereja and Order, Sereja and Permutations, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, Chef and Churu, The Spelling Problem

December Challenge 2014

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

January Lunchtime 2014

Chef and Shop, Chef and String, Chef and Numbers, Chef and Way

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, Random Rudreshwar, Abhijeet and rectangles

February Challenge 2015

Chef and Chain, Time to Study Graphs with Chef, Chef and Strange Formula, Chef and Strings, Payton numbers, Let us play with rank list, Xor Matrix, Jigsaw Puzzle Solving, Chef and Equality, Devu and Locks

March Challenge 2015

Count Substrings, Chef and Notebooks, Chef and Problems, Embedding, Sereja and Random Array, Random Number Generator, Devu and his Class, Sign Wave, Matrix, Counting on a Tree

May Challenge 2015

Devu and his three Hands, Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe, Chef and Balanced Strings, Shopping, Chef and Cake, Counting on a directed graph, Special Economic Zone

June Challenge 2015

Sereja and Matrix Division, Steady tables, Chef and His Friend, Chef and Memory Limit, Chef and Polygons, Another Fibonacci, Anticommutative implication, Chef and String, Chefbook, Connect Points

September Challenge 2015

Filling the maze, 3D Queries, Chain of Doughnuts, Nikitosh and xor, Count Steps in Matrix, Terrible vectors, Bank robbery, Lighthouses, Cracking the Code, Chef and Chetris

October Challenge 2015

Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Cyclic shifts in permutation, Rupsa and Equilateral Triangle, Misha and Gym, LCM equation, Jump mission, Efficient Delivery

December Challenge 2015

Sereja and Dividing, Chef and cinema, Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence, Misha and Permutation, Chef and Filters, Chef and Girls, Trip and Palindromes, Tanks

February Challenge 2016

Chef and Job and Rest, Sereja and Two Lines, Chef and Strange Operations, Devu and a light discussion, Weird Sum, Rectangles of Love, Chef-Detective, Matrix Maximum Sum, Sereja and Permutations, Call Center Schedule

March Challenge 2016

Sereja and Two Strings 2, Polygon & Circles, Chef And Hungry Birds, Palindromic substrings, Floor Distribution, Chef and Number Guessing, maximize the sum, Parity tree, Chef And Special Dishes, Tiptoe through the tulips

June Challenge 2016

Chef And The Hiring Event, Chef and Rectangle Array, Chef and New Game, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Chef and cities, Misha and Geometry, Devu and an Array, Chef and Sad Pairs

December Challenge 2016

Train Partner, Kth Max Subarray, Chef and Finding Direction, Sereja and Increasing subsequence, Kirito in labyrinth, Edit Distance Revisited, Roses for Alexey, Advanced Cooking Machine, Our Base is Under Attack, Bear and Three Colours

March Challenge 2017

Cooking Schedule, Completing favorite game, Sum of distances, Path Triples On Tree, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, Bear and Cat Trap, (CH) Bear and Sorted Rows, Bandwidth of a matrix

August Long Challenge 2017

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

September Challenge 2017

Sereja and Commands, Sereja and Functions (Challenge), Chef and Pick Digit, Minimum Good Permutation, Sum of Cubes, Querying on a Grid, Weasel does Xor on Tree, Weasel finds Staircase, Fill The Matrix, Little Chef and Sums

March Challenge 2019 Division 1

Chef and Soccer, Cheating on Queue, Sonya and Tree, Perfect Tree Problem, Treasure Hunt, Yet Again a Subarray Problem, Matchable Permutations, (Challenge) Interleaving Strings

Problems Authored (3)

Problems Tested (19)

Editorials Contributed (12)