import sys,copy
input=lambda:sys.stdin.readline().rstrip()
N=int(input())-2014
cur=0
ans=(N//400)*57
N%=400
for i in range(15,15+N):
	cur+=(1+(i%400==0 or (i%100!=0 and i%4==0)))
	ans+=(cur%7==0)
print(ans)