include[HTML_REMOVED]

using namespace std;
int a[11];
int t;
int ab=0;
int main()
{
for(int i=1;i<=10;i) cin>>a[i];
cin>>t;
for(int i=1;i<=10;i)
{
if(t+30>=a[i]) ab=ab+1;

}

cout<<ab;
return 0;

}