/* fi_lib: interval library version 1.2, for copyright see fi_lib.h */

# include "fi_lib.h"

double scandown()
{
    double x;
    scanf("%lf",&x);
    if (fabs(x) > (1e17 - 1) * 1e27) {
        return q_pred(q_pred(x));
    } else {
        return q_pred(x);
    }
}

double scanup()
{
    double x;
    scanf("%lf",&x);
    if (fabs(x) > (1e17 - 1) * 1e27) {
        return q_succ(q_succ(x));
    } else {
        return q_succ(x);
    }
}

interval scanInterval()
{ 
    interval dummy;
    dummy.INF = scandown();
    dummy.SUP = scanup();
    return dummy;
}