aoc-2020-python-day3-part1.py

def get_input():
  with open('input3full.txt') as f:
    passwords = f.readlines()
  return map(str.strip, passwords)


def get_next(right, down, x, y, land_map):
  x += right
  y += down
  line = land_map[y]

  return land_map[y][x % len(land_map[y])], x, y


def run():
  land_map = list(get_input())
  count, right, down, x, y = 0, 3, 1, 0, 0

  while y < len(land_map)-1:
    char, x, y = get_next(right, down, x, y, land_map)
    if char == '#':
      count += 1

  print(count)

if __name__ == '__main__':
  run()