N = int(input())
import itertools
TG_max = int(N/7)
T_max = int(N/5)
P_max = int(N/3)
TG = [i*7 for i in range(TG_max+1)]
T = [i*5 for i in range(T_max+1)]
P = [i*3 for i in range(P_max+1)]

print(sum([1 for i in itertools.product(TG,T,P) if sum(i)==N]))