from bisect import bisect
N = int(input())
nowy = 2015
dnow = 1
X = []
tmp = 0
while not((nowy - 2014) % 400 == 0 and dnow == 0):
    nowy += 1
    dnow += 1
    if nowy % 400 == 0:
        dnow += 1
    elif nowy % 100 == 0:
        dum = 0
    elif nowy % 4 == 0:
        dnow += 1
    if dnow > 6:
        dnow -= 7
    if dnow == 0:
        X.append(nowy - 2014)
ans = (N-2014) // 400 * 57
ans += bisect(X,(N - 2014) % 400)
print(ans)