n = int(input())
ans = 0
for t in range(21):
    if t * 5 > n:
        break
    for g in range(51):
        if t * 5 + g * 2 > n:
            break
        pg  = n - t * 5 - g * 2
        if pg % 3 == 0:
            ans += 1
print(ans)