include <bits/stdc++.h>//万能库

using namespace std;

int main()

{

int s1,s2,s3,s4,s5,s6,s7,s8,s9,s10;//十个苹果
int b,c=0,d;
cin>>s1>>s2>>s3>>s4>>s5>>s6>>s7>>s8>>s9>>s10;//输入苹果高度
cin>>b;//输入身高
d=b+30;//身高加板凳
if (s1<=d)
c++;
if (s2<=d)
c++;
if (s3<=d)
c++;
if (s4<=d)
c++;
if (s5<=d)
c++;
if (s6<=d)
c++;
if (s7<=d)
c++;
if (s8<=d)
c++;
if (s9<=d)
c++;
if (s10<=d)
c++;//每有一个苹果的高度小于身高加上板凳，那么c便+1
cout<<c;
return 0;
}