#!/usr/bin/env python3 from random import randrange import sys with open(sys.argv[1], 'r') as f: L = f.readlines() L = [x.strip() for x in L] # part 1 l = len(L) li = len(L[0]) s = [3, 1] i = 0 j = 0 t = 0 while i < l: i += s[1] j += s[0] if i < l and L[i][j % li] == '#': t += 1 print(t) # part 2 l = len(L) li = len(L[0]) ss = [[1, 1], [3, 1], [5, 1], [7, 1], [1, 2]] t = 1 for n in range(len(ss)): s = ss[n] i = 0 j = 0 tn = 0 while i < l: i += s[1] j += s[0] if i < l and L[i][j % li] == '#': tn += 1 t *= tn print(t)