# include <stdio.h>
int main ( )
{
	int gd[10] = {0};
	int sg = 0;
	int js = 1;
	
	scanf ("%d%d%d%d%d%d%d%d%d%d",&gd[0],&gd[1],&gd[2],&gd[3],&gd[4],&gd[5],&gd[6],&gd[7],&gd[8],&gd[9]);
	scanf ("%d",&sg);
	for (int n=0; n<10; n++)
	{
		if (sg>gd[n] || sg+30>gd[n])
			js++;
	}
	
	printf ("%d\n",js);
	
	
	
	return 0;
}