Project Euler 19: (Iron)Python
- by Ben Griswold
In my attempt to learn (Iron)Python out in the open, here’s my solution for Project Euler Problem 19.
As always, any feedback is welcome.
# Euler 19
# http://projecteuler.net/index.php?section=problems&id=19
# You are given the following information, but you may
# prefer to do some research for yourself.
#
# - 1 Jan 1900 was a Monday.
# - Thirty days has September,
# April, June and November.
# All the rest have thirty-one,
# Saving February alone,
# Which has twenty-eight, rain or shine.
# And on leap years, twenty-nine.
# - A leap year occurs on any year evenly divisible by 4,
# but not on a century unless it is divisible by 400.
#
# How many Sundays fell on the first of the month during
# the twentieth century (1 Jan 1901 to 31 Dec 2000)?
import time
start = time.time()
import datetime
sundays = 0
for y in range(1901,2001):
for m in range(1,13):
# monday == 0, sunday == 6
if datetime.datetime(y,m,1).weekday() == 6:
sundays += 1
print sundays
print "Elapsed Time:", (time.time() - start) * 1000, "millisecs"
a=raw_input('Press return to continue')
