file = open('/Users/mastermito/Dev/AdventOfCode/Day0/input.txt', 'r') #start of dial number = 50 #counter for zeros counter = 0 lines = file.readlines() for line in lines: step = int(line[1:]) direction = 1 if line.startswith('R') else -1; for singleStep in range(step): number = number + direction number = number % 100 if number == 0: counter += 1 print('counter:', counter) file.close()