#include<stdio.h>
int main()
{int a[10];
int c=0;
int b;
for(int i=1;i<11;i++)
{
scanf("%d",&a[i]);
}scanf("%d",&b);
for(int i=1;i<11;i++)
{if(a[i]<=b+30){
	c=c+1;
}}
	printf("%d\n",c);
}
/**************************************************************
	Problem: 2252
	User: admin
	Language: C
	Result: Runtime Error
****************************************************************/