n=int(input())
p=[[2]]
q=[2]
for i in range(3,n+1):
 for j in q:
  if i%j==0:
   p.append(p[j-2]+p[i//j-2])
   break
  if j*j>=i:
   p.append([i])
   q.append(i)
   break
print(sum(len({*v})==len(v)==4 for v in p))