#coding: utf-8
##yuki_87

def leap(y):
 if y%400==0:
  return True
 if y%100==0:
  return False
 if y%4==0:
  return True
 return False
 

n=int(raw_input())

x=0
y=2014
count=0
while y<=n:
 if y+400<=n:
  y+=400
  count+=57
 if x==0:
  count+=1
 if leap(y+1)==True:
  x+=2
 elif leap(y+1)==False:
  x+=1
 x%=7
 y+=1
 
print count -1