N=int(input())
R=range
P=[k for k in R(2,120000)if all(k%i for i in R(2,int(k**0.5)+1))]
L=len(P)
A=0
for i in R(L):
 for j in R(i+1,L):
  if P[i]*P[j]>N:break
  for k in R(j+1,L):
   if P[i]*P[j]*P[k]>N:break
   for l in R(k+1,L):
    if P[i]*P[j]*P[k]*P[l]>N:break
    else:A+=1
print(A)