easy

#include<iostream>
using namespace std;

int a[100010];
int apple=10,cnt=0;
int reach;
int main(){
    for (int i=1;i<=apple;i++){
        cin>>a[i];
    }
    cin>>reach;
    const int MAX=reach+30;
    for (int i=1;i<=apple;i++){
        if (a[i]<=MAX) cnt++;
    }
    cout<<cnt;
    return 0;
}