num27.1

#include <iostream>
#include <fstream>
using namespace std;

int main()
{
    int now = 0, a = 0, b = 0;
    ifstream input("C:\\Users\\Максим\\Downloads\\27986_B.txt");
    while (input >> now && now != 0) {
        if (now % 7 == 0 && now % 49 != 0 && now > a) {
            a = now;
        }
        else if (now % 7 != 0 && now > b) {
            b = now;
        }
    }
    cout << ((a * b == 0) ? 1 : a * b);
}