'''
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)?
'''

#spoznavamo novo knjiznjico
import datetime

resitev = 0
for leto in range(1901, 2001): #leta
    for mesec in range(1, 13):  #meseci
        if datetime.date(leto, mesec, 1).weekday() == 6:  #0 je ponedeljek, 6 je nedelja
            resitev += 1

print(resitev)
