include <stdio.h>

int main()

{

int a[9],height=0,get=0;

for(int i=0;i<=9;i++)
{
    scanf("%d",&a[i]);
}

scanf("%d",&height);

for(int j=0;j<=9;j++)
{
    if(height+30>=a[j]) get++;
}

printf("%d",get);

return 0;

}