kcelestine

import sys
from datetime import date

def zeller(day, month, year):
    if month==1 or month==2:
        month+=12
        year-=1
    h = ( ( day +( (month+1) * 26 // 10)+ year +( year // 4)+ 6 * (year // 100)+ (year // 400)) % 7 )+6
    return h%7