Completed day 12 of year 2020

Author: fschatbot

2020/12.py

@@ -0,0 +1,65 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+from math import cos, sin, pi
+
+split_data = True
+completed = True 
+raw_data = None # Not To be touched
+
+def part1(data):
+	px, py = 0, 0
+	moveMap = {
+		'N': (0, 1),
+		'E': (1, 0),
+		'S': (0, -1),
+		'W': (-1, 0)
+	}
+	directions = [*moveMap.keys()]
+	facing = 1
+	for line in data:
+		command, unit = line[:1], int(line[1:])
+		if command in moveMap:
+			dx, dy = moveMap[command]
+			px += dx * unit
+			py += dy * unit
+		elif command == 'F':
+			dx, dy = moveMap[directions[facing % 4]]
+			px += dx * unit
+			py += dy * unit
+		elif command == 'R':
+			facing += unit // 90
+		elif command == 'L':
+			facing -= unit // 90
+	
+	return abs(px) + abs(py)
+
+def part2(data):
+	px, py = 0, 0
+	wx, wy = 10, 1
+	moveMap = {
+		'N': (0, 1),
+		'E': (1, 0),
+		'S': (0, -1),
+		'W': (-1, 0)
+	}
+
+	for line in data:
+		command, unit = line[:1], int(line[1:])
+		if command in moveMap:
+			dx, dy = moveMap[command]
+			wx += dx * unit
+			wy += dy * unit
+		elif command == 'F':
+			px += wx * unit
+			py += wy * unit
+		elif command == 'L':
+			tx = cos(pi * unit / 180) * wx - sin(pi * unit / 180) * wy
+			ty = sin(pi * unit / 180) * wx + cos(pi * unit / 180) * wy
+			wx, wy = round(tx), round(ty)
+		elif command == 'R':
+			tx = cos(pi * unit / 180) * wx + sin(pi * unit / 180) * wy
+			ty = -sin(pi * unit / 180) * wx + cos(pi * unit / 180) * wy
+			wx, wy = round(tx), round(ty)
+	
+	return abs(px) + abs(py)