aoc-2020/5.py

lines = []

with open("5.input") as f:
    for line in f.readlines():
        lines.append(line)

ids = []

for line in lines:
    head, tail = line[0:7], line[7:10]
    row = int(head.replace('F', '0').replace('B', '1'), 2)
    col = int(tail.replace('L', '0').replace('R', '1'), 2)
    ids.append(row * 8 + col)

print("Answer 1: {}".format(max(ids)))

ids.sort()

last_id = ids[0] - 1
for id in ids:
    if id != last_id + 1:
        print("Answer 2: {}".format((id - 1)))
    last_id = id