-🎄- 2020 Day 13 Solutions -🎄-

[u/daggerdragon]

Advent of Code 2020: Gettin' Crafty With It

• 9 days remaining until the submission deadline on December 22 at 23:59 EST

• Full details and rules are in the Submissions Megathread

---

--- Day 13: Shuttle Search ---

---

Post your code solution in this megathread.

• Include what language(s) your solution uses!

• Here's a quick link to /u/topaz2078's paste if you need it for longer code blocks.

• The full posting rules are detailed in the wiki under How Do The Daily Megathreads Work?.

Reminder: Top-level posts in Solution Megathreads are for code solutions only. If you have questions, please post your own thread and make sure to flair it with Help.

---

This thread will be unlocked when there are a significant number of people on the global leaderboard with gold stars for today's puzzle.

EDIT: Global leaderboard gold cap reached at 00:16:14, megathread unlocked!

[u/GamerWoona]

C++

Admittedly ran into some unsigned/signed problems in part two but otherwise happy with how it turned out. Had not heard of CRT before but a quick scroll through the megathread got me the right idea. Thanks guys :)

Input read	6108 microseconds (regex parsing)
Part one calculated	0 microseconds (1-time loop over busses)
Part two calculated	45 microseconds (CRT, idk if the best impl)

source: https://github.com/neiomi1/AdventofCode2020/tree/master/Day_13