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#!/usr/bin/python
import sys;
MON = 0
TUE = 1
WED = 2
THU = 3
FRI = 4
SAT = 5
SUN = 6
JAN = 1
FEB = 2
MAR = 3
APR = 4
MAY = 5
JUN = 6
JUL = 7
AUG = 8
SEP = 9
OCT = 10
NOV = 11
DEC = 12
MONTHS_31 = [JAN,MAR,MAY,JUL,AUG,OCT,DEC]
class Date:
def __init__(self,d,m,y):
self.day = d
self.month = m
self.year = y
def __str__(self):
return str(self.day) + "/" + str(self.month) + "/" + str(self.year)
def isLeap(year):
return (year % 4 == 0) and ((year % 100 != 0) or (year % 400 == 0))
def calcNumDays(start,end):
days = 0
currentMonth = start.month
currentDay = start.day
for year in range(start.year+1,end.year):
if(isLeap(year)):
days += 366
else:
days += 365
leap = 0
# Beginning
year = start.year
if(isLeap(year)):
leap = 1
for month in range(start.month+1, DEC+1):
if(month in MONTHS_31):
days += 31
elif(month == FEB):
days += 28
else:
days += 30
days += (31 - start.day + 1 + leap)
leap = 0
# End
year = end.year
if(isLeap(year)):
leap = 1
for month in range(JAN,end.month):
if(month in MONTHS_31):
days += 31
elif(month == FEB):
days += 28
else:
days += 30
days += (end.day + leap)
return days
def getMonthLimit(month,year):
limit = 0
if(month in MONTHS_31):
limit = 31
elif(month == FEB):
if(isLeap(year)):
limit = 29
else:
limit = 28
else:
limit = 30
return limit
def SundaysFirstOfMonth(start,initial,numDays):
sundays = 0
currentDay = start.day
currentMonth = start.month
currentYear = start.year
currentWeekday = initial
limit = getMonthLimit(currentMonth, currentYear)
for i in range(0,numDays):
if (currentDay > limit):
currentMonth += 1
currentDay = 1
if currentMonth > 12:
currentMonth = 1
currentYear += 1
limit = getMonthLimit(currentMonth, currentYear)
if ((currentDay == 1) and (currentWeekday == SUN)):
sundays += 1
currentDay += 1
currentWeekday = (currentWeekday + 1) % 7
return sundays
strDateEnd = sys.argv[1].split('/')
dateStart = Date(1,1,1901)
dateEnd = Date(int(strDateEnd[0]),int(strDateEnd[1]),int(strDateEnd[2]))
initialDay = TUE
numDays = calcNumDays(dateStart,dateEnd)
numSundays = SundaysFirstOfMonth(dateStart,initialDay,numDays)
print "Result is: " + str(numSundays)
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