C++ 代码

#include <iostream>
using namespace std;


int main()
{
    int n, ret = 0;;
    int a[10];
    for(int i = 0; i < 10; ++ i) cin >> a[i];

    cin >> n;
    for(int i = 0; i < 10; ++ i) ret += a[i] <= n + 30;
    cout << ret << endl;

    return 0;
}