Colin Galen

March Challenge 2019 Division 2

Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit, Chef got Recipes

March Cook-Off 2019 Division 2

XOR N-bonacci Sequence, UEFA Champions League

April Challenge 2019 Division 2

Maximum Remaining

April Challenge 2020 Division 2

Leaked Answers (Challenge), COVID Pandemic and Long Queue, Sell All the Cars, Unit GCD, Ready Bitwise, Perfect Power Divisors, Strange Number, Squared Subsequences, Factor Tree

March Cook-Off 2020 Division 2

Escape the Tree , Maximize Letter Beauty, Box of Chocolates, Find Your Gift, Mysterious Sequence

April Cook-Off 2020 Division 1

Tower Counting, Simple Operations

May Cook-Off 2020 Division 1

Chef, Chefina and Their Friendship, Chefland Squads and the Army Chief, Chefina on a Trip, Roads in Chefland

March Lunchtime 2020 Division 2 (Unrated)

Good Prefix, Chef Swaps Digits, Maximize LCM, Strip in a Tree!

April Lunchtime 2020 Division 1

Dot Time, Triangle Query, Positive Mex

May Lunchtime 2020 Division 1

Absolute Min Max, Escape One, Convert the String, Tree difference

August Cook-Off 2020 Division 1

Red-blue Trees, Polygon Relationship, Chefina and Dishes

August Lunchtime 2020 Division 1

Alien Invasion , Mode of Frequencies, Game on a Strip, Counting Graphs

RECode 12.0 (Rated for all)

Chef and String, Chef and Walk, Chef and Rotation, Chef and Or, Chef and Numbers

November Cook-Off 2020 Division 1

Chef and IPC Certificates, Hiring Workers, Communication Channel, Graph Construction, Flip the String

Coders' Legacy (Rated for all)

Chef vs Doof, Doof on Cartesian, Doof fires Brackets, Jeremy gets a gift, Unique Substring

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Editorials Contributed (4)