Euler19_help

weekday=[0,1,2,3,4,5,6]
month=[31,28,31,30,31,30,31,31,30,31,30,31]
leap_feb=29
day=1
first_sunday=0
for year in range(1900,2001):
    for mon in month:
        #leap year
        if (year%4)==0 and mon==28:
            for i in range(0,leap_feb):
                if day==0 and i==0:
                    first_sunday+=1
                day+=1
                if day==7:
                    day=0

        #non leap year
        else:
            for i in range(0,mon):
                if day==0 and i==0:
                    first_sunday+=1
                day+=1
                if day==7:
                    day=0
print(first_sunday)