Zecong Hu

Practice: 

Sereja and Game, Prime Distance On Tree, Sereja and Vectors, Let us construct palindrome

October Challenge 2012: 

Fierce Battles, Event Organizer, Maximum Sub-rectangle in Matrix, The New Scheme, Need More Diamonds

April Challenge 2013: 

Little Elephant and Music, Barcelona Gameplay Tactics, Kingdom Unity, Fault Tolerance, Maximum Weight Difference, Levy Conjecture

May Challenge 2013: 

Matchsticks, Witua and Math, Tree Counting, Queries on tree again!, 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, Predictopus, W String, Lapindromes

Lunch Time June 2013: 

Online Shopping, Number of Factors

August Challenge 2013: 

Little Elephant and Lemonade, Hello Hello, Save The Princess, The Number Of Solutions, Chef and Segments, Sereja and Ballons, Splitting Candies

September Challenge 2013: 

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

October Challenge 2013: 

Little Elephant and Bamboo, Helping Lira, Maxim and Dividers, Sereja and Transformation, CAO Stage-3, Yet Another Nice Girl, Edit Distance on Grid, Kamehameha

November Challenge 2013: 

Chef Game, Superpowers of 2, Gangsters of Treeland, Yet Another Cute Girl, Sereja and Vectors, 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, Funny Marbles, Magic Pairs, Reign, Rectangular Queries, Query on a tree VI

January Challenge 2014: 

Magic Trick, Counting The Important Pairs, Sereja and Graph, ForbiddenSum, Meteor, Bon Appetit, Please like me, Chef and Feedback

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, 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, Chef and Strange Matrix, Stone

June Challenge 2014: 

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

July Challenge 2014: 

Little Elephant and Painting, Garden Game, Chef and Frogs, Count Substrings, Reach The Point, Dish Owner

August Challenge 2014: 

Little Elephant and T-Shirts, Chef and Reversing, The Leaking Robot, Cleaning Tables, Chef and Gift

September Challenge 2014: 

Factorisation, Chef and Rainbow Array - 2, Chef and Swaps, Chef and Left-Right, Chef and sequence, Fun with Rotation, Flooring

January Lunchtime 2014: 

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

February Lunchtime 2014: 

Sereja and Two Arrays, Sereja and ASum, Sereja and D, Sereja and Arrays

March Lunchtime 2014: 

Nice SubSegments, A Game With a Sheet of Paper, Statements Checking

September Challenge 2019 Division 1: 

Biladerim Icin, Fuzzy Linear Combinations

SnackDown 2021 - Online Qualifiers: 

Lucky Number, Maximum Number Of Distinct Elements

SnackDown 2021 - Online Round 1A: 

Round Robin Ranks , Dance Moves, Min Max LCM

SnackDown 2021 - Online Round 1B: 

Queens Placement , Largest Laddu, Help Nishant

SnackDown 2021 - Online Pre-Elimination: 

Product Pain

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