lb2.3.8

#include "stdafx.h"
#include <iostream>
using namespace std;

void main (){
    for (int i = 1000; i < 10000; i++) {
        bool simple = true;
        if (!(i % 2)) {
            simple = false;
        }
        else {
            int sqrti = static_cast<int>(sqrt(i));
            for (int ii = 3; ii <= sqrti && simple; ii += 2) {
                if (i % ii == 0) {
                    simple = false;
                }
            }
        }
        int temp = i;
        int n1, n2, n3, n4;
        n4 = temp % 10;
        temp /= 10;
        n3 = temp % 10;
        temp /= 10;
        n2 = temp % 10;
        temp /= 10;
        n1 = temp % 10;
        temp /= 10;
        if (n1 + n2 == n3 + n4 && simple) cout << i << " ";
    }
}