#1229

N = int(input())
Anslist = []
for a in range(0, 21):
    for b in range (0, a + 1):
        for c in range(0, 34):
            if N == 7 * a - 2 * b + 3 * c:
                Anslist.append([a, b, c])
            else:
                pass
Ans = len(Anslist)
print(Ans)