#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;
}