def isLeapYear(year):
    if year % 4 == 0:
        if year % 100 == 0 and year % 400 != 0:
            return False
        else:
            return True
    else:
        return False

def daysInMonth(month, year):
    while month in [1, 3, 5, 7, 8, 10, 12]:
        return 31
    while month in (4, 6, 9, 11):
         return 30
    if month == 2:
         if isLeapYear(year):
             return 29
         else:
             return 28


def daysBetweenDates(year1, month1, day1, year2, month2, day2):
    days = 0
    while year1 < year2:
        if day1 != 1:
            days = days + daysInMonth(month1,year1)-day1+1
            day1 = 1
            month1 = month1+1
        while month1 < 13:
            days = days + daysInMonth(month1,year1)
            month1 = month1+1
        if month1 == 13:
            month1 = 1
            year1 = year1+1
    if year1 == year2:
        if day1 != 1:
            days = days + daysInMonth(month1,year1)-day1+1
            day1 = 1
            month1 = month1+1
        while month1 < month2:
            days = days+daysInMonth(month1, year1)
            month1 = month1+1
        if month1 == month2:
            days = days + day2-day1
    return days



print daysBetweenDates(2012,1,1,2012,2,28)
# 58
print daysBetweenDates(2012,1,1,2012,3,1)
# 60
print daysBetweenDates(2011,6,30,2012,6,30)
# 366
print daysBetweenDates(2011,1,1,2012,8,8)
# 585
print daysBetweenDates(1900,1,1,1999,12,31)
# 36523