Hardest Advent of Code 2020 Problem (day 20 Jigsaw, backtracking)

Solution for Jurassic Jigsaw, which was the hardest problem in Advent of Code 2020 https://adventofcode.com/2020/day/20. Two more problems to practice backtracking: https://leetcode.com/problems/n-queens/ & https://cses.fi/problemset/task/1625.
I stream coding every even weekday! https://www.twitch.tv/errichto

0:00 Intro
0:18 Statement
1:07 Corners (easy)
2:06 Backtracking
3:54 Small Visualization
4:11 Code
7:00 Big Visualization
8:15 Sea Monsters
10:32 Outro

- Github repository: https://github.com/Errichto/youtube
- Streaming schedule: https://calendar.google.com/calendar/embed?src=0qldhlvr0oqd867pdi8nkm8s04%40group.calendar.google.com
- Past streams: https://youtube.com/errichto2
- Frequently Asked Questions: https://github.com/Errichto/youtube/wiki/FAQ
- Discord server: https://discord.gg/YWb3Bmg