Biarbore1

#include <fstream>
using namespace std;

int main()
{
    int x,a;
    ifstream f("biarbore1.in");
    f>>x>>x;
    ofstream g("biarbore1.out");
    g<<x<<' ';
    a=2*!!x;
    while(a) /// citim doar descendentii fiului din stanga al radacinii
        f>>x,a+=(x?1:-1);
    f>>x;
    g<<x;
    return 0;
}