day3/count_trees.py

   1 #!/usr/bin/python3
   2
   3 trees_count = 0
   4 position = 3 # forth square in, we moved 3 right from where we were, 0 + 3 -> 3
   5 on_first_line = True
   6 line_number = 0
   7
   8 for line in open("input.txt", "r"):
   9     line_number += 1
  10     print("line: ", line_number)
  11     line = line.rstrip()
  12     print(line)
  13     if on_first_line:
  14         on_first_line = False
  15         continue
  16     print(line[position], position)
  17     if line[position] == "#":
  18         trees_count += 1
  19         print("hit tree")
  20     else:
  21         print("missed tree")
  22     # now add 3 to the position
  23     position += 3
  24     if position >= len(line):
  25         position = position - len(line)
  26
  27 print("There were", trees_count, "trees")