William Lin

Practice: 

Enormous Input Test, Life, the Universe, and Everything, The Lead Game, Discrepancies in the Voters List, Minesweeper, Andrew and the Balls, Ancient Berland Roads, Tree Balancing, Hill Jumping, Saboteur (Challenge), Prefix Inversions, Chef and Universe, Company and Club Hierarchies, Servers (Challenge), Isha and Odd Cycle, Region of Calabria, Find the Maximum Value, Good Pairs, Mathison and the Data Warehouse (Challenge), Total Diamonds, Modular GCD, Buggy Calculator, Maximum Number, A tale of two trees, Killing Monsters, A humongous Query, Chef And his Cake, Chef, Leonardo And Queries, Chef And Easy Xor Queries, Penalty Shoot-out, Red and blue points, The Prestige, Chef and Hamming Distance of arrays, Killjee and k-th letter , K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers, Nearest Angle, K Perfect Matchings, Graph on a Table, Permutation Composition Queries, Changing Numbers, Dot It, Biased Judgement, Chef Restaurant , Match the Streams, Coin Partition, Spread the Word, Finding Teammate, Qualifying to Pre-Elimination, Chef and Operations, Chef and Semi-Primes, Chef and Strange Addition, Graph on an Array, Chef and Typing, Chefland and Average Distance, Chef and Card Trick, Chef and Periodic Sequence, A Game of Robots, A Family of Bipartite Graphs, Reduction Game, Word Grid, Robots Again, Tree Walk, Painting Tree, Heap Pirates, Strange Transform, Buddy NIM, Spectacular Activity Selection, Arranging the Inventory, Chef and Two Queens, Colorblind Feast, Suffix Palindromes, Median, Recover Square, Lighting Rectangle, Adi and the Matrix, Adi and the Tree, The Most Amazing Dish, Attendance, Fast Food, Firdavs and Planet F, Minimum Sum, Chef Rami and Inventions, Chefina and Ranges, Chef and DAG, Binary XOR, Binomial Fever, Scoring Pairs, Sticky Notes, Test Generation, Chef and Railway Stations, Team Trees, Planting Trees, (Challenge) Cubical Virus, Washing Windows, Perfection, Servers, Addition, Ada Bishop 2, Xor It, Crash It, Make It, The Inexplicable Giant Floating Baby Head, Decorate It, Tree Query, Expected Change, No Change Required, Balancing Network Revisited, Count It, Lasers Everywhere, Chef and Gordon Ramsay 2, The Theatre Problem, School of Geometry, Lasers Everywhere Alternative, Folding Paper, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps, Polygon Chain, Coronavirus, Painter Problem, At the Gates, Swapping to Palindrome, Not All Flavours, Monsters Battle, Secret Mission, Mysterious Sequence, Yet Another Flipping Problem 2, Help Utkarsh, Help Nishant, Sarthak and his Magic Grid

Past ZCO Problems: 

Matched Brackets, Wormholes, Matched Brackets 2, Round Table, Tournament, Little Red Riding Hood, Chewing, Save Spaceman Spiff, Video Game, SUPW, Smart Phone, IPL, Break Up, Variation, Covering, Rectangle, Bookshelves, Bamboo Art

Past INOI Problems: 

Triathlon, Table Sum, Calvins Game, Sequence Land, Highway Bypass, Special Sums, Periodic Strings, Free ticket, Wealth Disparity, Brackets

July Challenge 2017: 

Chef and Sign Sequences, Irrational Root, Pishty and tree, Multiplication Program, Tree Expectancy, Whats in the Name, Servers (Challenge), Calculator , IPC Trainers, Two Coins

August Long Challenge 2017: 

Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, 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, Weasel does Xor on Tree, Fill The Matrix, Little Chef and Sums

October Challenge 2017: 

Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Shooting on the array, Max Mex, Chef and Horcrux, Counter Test For CHEFSUM, A Balanced Contest, (Challenge) Connecting computers, Lucky Edge

November Challenge 2017: 

Chef and Intersection Line, Product on the segment by modulo , Chef Hates Palindromes, Chef and Subarray Queries, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes

June Lunchtime 2017: 

Maximum Unique Segment, Two Numbers

LoC July 2017: 

Magical Cave And Horse, Boss and his Brother, Amit and Nitin , At The End, Region of Calabria

Innerve's Summer Code Challenge: 

Suhana and Matrix World, Girls and Security Patrol, Girls and Historical Similarity of Strings, Suhana and Horror House, Suhana and Equation

July Cook-Off 2018 Division 1: 

Sticks, OR Matrix, Finding Second Maximum, Chef and GCD Game

September Mega Cook-Off 2018 Division 1: 

OneTwo, Learning Dishes, Make a Permutation, Ghayeeth vs Siroj

August Challenge 2018 Division 1: 

Coordinate Compression , Modular GCD, Princess and Dragons, Chef in a Mysterious Land (Challenge), Safe Partition, Interactive Matrix, Chef at the River, Lonely Cycles

June Lunchtime 2018 Division 1: 

Unusual Sorting, Sort the Leaves, Permutation Composition Queries, Summary Power

July Lunchtime 2018 Division 1: 

Forced Particles, GCD Sum, Make a String, Prime divisors

August Lunchtime 2018 Division 1: 

Chef and Eid, Mix Mix Game, X and Two Groups, GukiZ Has More Candies

September Lunchtime 2018 Division 1: 

Biased Judgement, Opposite Cites, Chef Restaurant , Match the Streams, Coin Partition

November Lunchtime 2018 Division 1: 

Useful Number, Maximize It, Probability, Beats and Pieces

October Lunchtime 2018 Division 1: 

Coloring the Grid, Weird Question, Niceness of the Arrays

Replay of Indian IOI Training Camp (IOITC) #1 (Rated): 

Circular Intervals

Replay of Indian IOITC 2018 #2 (Rated): 

Exact Walks, Coin Denominations, Changing Numbers

November Lunchtime 2019 Division 1: 

Team Trees, Planting Trees, Washing Windows, Perfection, Servers

December Cook-Off 2019 Division 1: 

Xor It, Crash It, Make It, The Inexplicable Giant Floating Baby Head, Decorate It

December Lunchtime 2019 Division 1: 

Stick and polygon, The Evil Professor, Frequency Function, Guess the number

December Challenge 2019 Division 1: 

Chefina and Ranges, Binary XOR, Binomial Fever, Scoring Pairs, Sticky Notes, Test Generation, (Challenge) Cubical Virus, Addition

January Challenge 2020 Division 1: 

Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English, Army of Me, Chefland Army, (Challenge) Building Anthills

January Cook-Off 2020 Division 1 : 

Almost Palindromic, Chef Chick, Exam Cheating, Profitable Paths, Count It, Range AND, Chefina and Sums

February Cook-Off 2020 Division 1: 

Must Be Divisible, Maximum Subsequence Sum, XOR Game, Sweetest Candy , Chef and Pepperoni Pizza Again, Penalty Shoot-Out II, Tax Slabs

January Lunchtime 2020 Division 1: 

Minimum and Maximum, Construct Array, Bob and His Friends, Chef and Street Food, CCDSAP Exam, Under the Tunnels, Folding Paper

Aarambh 2020: 

Straight lines, Cricket Match, Xor Segment, Odd Topic, Bacterias, Jolites, Two Kings and Their Estate

SnackDown 2021 - Online Qualifiers: 

Lucky Number

SnackDown 2021 - Online Round 1B: 

Insider Subsequences, Queens Placement , Largest Laddu

SnackDown 2021 - Online Pre-Elimination: 

Non-Decreasing Subsequence of size K, Good ranking, Product Pain, Guests like slippers

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Problems Tested (0)

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