include

include

using namespace std; int apple[15]; int main(void){

//freopen("1124.in","r",stdin);
//freopen("1124.out","w",stdout);
int high,ans=0;
for(int i=0;i<10;i++){
	scanf("%d ",&apple[i]);
}
scanf("%d",&high);
for(int j=0;j<10;j++){
	if(high+30>=apple[j]){
		ans++;
	}
}
printf("%d",ans);
return 0;

}