// input code here#include<iostream>

using namespace std;

int main(){
    int high,final;
    int apple[15];
    for(int i=0;i<10;i++){
        cin>>apple[i];
    }
    cin>>high;
    high+=30;
    for(int i=0;i<10;i++){
        if(high>=apple[i]){
            final++;
        }
    }
    cout<<final<<endl;
    return 0;
}