N = int(input())
num = 1
cnt = 0
for y in range(2015,2413+1):
    if y%400==0:
        cnt += 2
    elif y%100==0:
        cnt += 1
    elif y%4==0:
        cnt += 2
    else:
        cnt += 1
    cnt = cnt%7
    if cnt==0:
        num += 1
q = (N-2014)//400
r = (N-2014)%400
ans = 0
cnt = 0
for y in range(2015,2014+r+1):
    if y%400==0:
        cnt += 2
    elif y%100==0:
        cnt += 1
    elif y%4==0:
        cnt += 2
    else:
        cnt += 1
    cnt = cnt%7
    if cnt==0:
        ans += 1
ans += num*q     
print(ans)