import sys
import datetime

def main():
    my_date = datetime.date(2015,1,1)
    day_counter = 0
    for i in range(365):
        adding_date = datetime.timedelta(days=i)
        target_date = my_date+adding_date
        num1 = int(target_date.day)%10
        num2 = int(target_date.day)//10
        num3 = int(target_date.month)
        
        if num3 == num1+num2:
            #print(target_date)
            day_counter += 1 
    print(day_counter)
    
if __name__ == "__main__":
    main()