mayaohua

Practice: 

Counting D-sets, Fibonacci Number, Querying on a Grid, Day Schedule, Walk on Tree, Max-digit Tree, A Simple Game, Buying a New String, Triple Sort, Binary Land, Sorting Vases, Not a Real World Problem, Chef and Rainbow Road, Chef and Bitwise Product, Precise Pairing, Precise Bipartite Pairing

November Challenge 2018 Division 2: 

Chef and Ridges, Appy Loves One, Good Median, Magician versus Chef 2, Chef and Difficult Contests, Chef and Happiness

January Challenge 2019 Division 2: 

Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, A Pizza Slice

March Challenge 2019 Division 2: 

Chef and Soccer, Chef got Recipes, Cheating on Queue, Sonya and Tree, Perfect Tree Problem, Chef and Number Game, Treasure Hunt, Yet Again a Subarray Problem, Chef and a Beautiful Digit, Matchable Permutations

April Challenge 2019 Division 1: 

Offer for Chef, Kira Loves Palindromes, Mininum XOR over Tree, Playing with Numbers, Subtree Removal, Edgy

May Challenge 2019 Division 1: 

Ada Rooks 2, Trees and Degrees, Chef and Elephant Tree, Where to Build the Roads, Sonya and Gifts, Ada Pawns

June Challenge 2019 Division 1: 

Lent Money, Count Arrays, Chef and Ingredients, Chef and His Dish, Intersecting Paths, Sum and GCD, Forgotten Tree 9

August Challenge 2019 Division 1: 

Guddu and his Mother, Encoding, Dilemma, Maximize an Expression, Chef and Gordon Ramsay, Complement Spanning Trees

September Challenge 2019 Division 1: 

Biladerim Icin, Fuzzy Linear Combinations, Expected GCD, Doofish Set, Dodgers, Power Sum, Chef Designed a Network

October Challenge 2019 Division 1: 

Queries on Matrix, Even Edges, Bacterial Reproduction, Chef and Maximum Star Value, Array Modification, Faulty System

November Challenge 2019 Division 1: 

Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, Single Point of Failure, Winning Ways, Pretty Boxes, D-Dart

December Challenge 2019 Division 1: 

Chefina and Ranges, Binary XOR, Binomial Fever, Scoring Pairs, Sticky Notes, Addition

March Challenge 2020 Division 1: 

Chef and DAG, Break, Winning Ways 2, Lasers Everywhere, Inverse of a Function, Lasers Everywhere Alternative, Good Subsequences, Egg-free DAG

April Challenge 2020 Division 1: 

Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, A Leisurely Journey, Line Line Line Graph, Leaked Answers (Challenge)

June Challenge 2020 Division 1: 

The Tom and Jerry Game!, Operations on a Tuple, The Delicious Cake, Convenient Airports, Guessing Game, Perfect Partitions, Covid Sampling (Challenge), Danya and Different Values

July Challenge 2020 Division 1: 

LCM Constraints, Chefina and Swaps, Easy Geo xD, Chef and Dragon Dens, Missing a Point, Doctor Chef, Weird Product, Expected Repetitions, Expected Spanning Trees

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