难

#include<iostream>
using namespace std;
int main(){
int a[11],n,sum = 0;
for(int i = 1;i <= 10;i++){
cin>>a[i];
}
cin>>n;
for(int i = 1;i <= 10;i++){
if(a[i] <= n + 30){
sum++;
}
}

cout<<sum;

}