程序代码：

#include<iostream>
#include<iterator>
#include<numeric>
using namespace std;

int main()
{
    istream_iterator<int> in(cin);
    istream_iterator<int> in_eof;
    int a, b;
    cin >> a >> b;
    cout << accumulate(in, in_eof, 0) << endl;
    cout << a <<' '<< b;

}