#include<iostream>
using namespace std;
int main(){
	int apple[11] = {0};
	int taotao;
	int zbd;
	int s= 0;
	for(int i = 1;i <=  10;i++){
		cin >> apple[i];
	}
	cin >> taotao;
	zbd = taotao + 30;
	for(int i = 1;i <= 10;i++){
		if(zbd < apple[i]){
			s++;
		} 
	}
	cout << s;
	return 0;
}