#include <stdio.h>

int main()

{

int apple[10] = {0},tt,n = 0,i,j;
for(i = 0;i<10;i++)
    scanf("%d",&apple[i]);
scanf("%d",&tt);
for(j = 0;j<10;j++)
{
    if(tt+30>=apple[j])
        n++;
}
return n;

}