aoc-2020-python-day5-part-1.py

def calc(ticket):
    seat_id = 0
    for i, instr in enumerate(ticket):
        if instr in 'BR':
            seat_id += 2**(9-i)
    return seat_id


def part_1(data):
  return max(calc(line) for line in data)

  
if __name__ == '__main__':
    with open('input5.txt', 'r') as f:
        inp = f.read().strip().split('\n')

    print(part_1(inp))