Advent of Code 2020 day 12 pt 2

aoc2020-day12-pt2.py

import math

T = "bb.txt"
M = "aa.txt"

file1 = open(M, 'r')
Lines = file1.read().splitlines()

sx, sy = 0, 0
wx, wy = 10, 1
input_map = {}

for i, line in enumerate(Lines):
    if len(line.strip()) == 0:
        continue
    input_map[i] = line

for l in input_map:
    order = input_map[l]
    o, v = order[0], order[1:]
    if o == 'F':
        sx += wx * int(v)
        sy += wy * int(v)
    elif o == 'N':
        wy += int(v)
    elif o == 'S':
        wy -= int(v)
    elif o == 'E':
        wx += int(v)
    elif o == 'W':
        wx -= int(v)
    elif o == 'L':
        # 2D rot formula
        rad = math.radians(int(v))
        xn = (math.cos(rad)*wx) - (math.sin(rad)*wy) 
        yn = (math.sin(rad)*wx) + (math.cos(rad)*wy) 
        wx = round(xn)
        wy = round(yn)
    elif o == 'R':
        rad = math.radians(360 - int(v))
        xn = (math.cos(rad)*wx) - (math.sin(rad)*wy) 
        yn = (math.sin(rad)*wx) + (math.cos(rad)*wy) 
        wx = round(xn)
        wy = round(yn)

res = abs(sx) + abs(sy)
print(res)