Source: Day 2: Gift Shop

Full solution for today (spoilers!).

Part 1

Given a list of ranges a-b (ie 11-22), sum all values that are made of two repeated chunks of digits (ie 123123)

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Source: Day 1: Secret Entrance

Full solution for today (spoilers!).

Part 1

Implement a padlock with 100 values (0-99). Run each command (L23 to turn left by 23 places) and then output the number of times you landed on zero.

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Yesterday’s challenge from Programming Praxis challenges us to rebuild a data structure near and dear to any Lisper’s/Schemer’s/Racketer’s¹/functional programmer’s heart: lists. The idea presented in their sample solution uses two element vectors, directly mimicking the general internal structure of Scheme’s lists. How about we do something a bit stranger? 😄

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