William Lin

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

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

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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Editorials Contributed (34)