#!/usr/bin/python3 import datetime from timeit import default_timer def main(): start = default_timer() count = 0 for year in range(1901, 2001): for month in range(1, 13): if datetime.datetime(year, month, 1).weekday() == 6: count = count + 1 end = default_timer() print('Project Euler, Problem 19') print('Answer: {}'.format(count)) print('Elapsed time: {:.9f} seconds'.format(end - start)) if __name__ == '__main__': main()