double f(double a, double b, double c) {
double r3646613 = a;
double r3646614 = b;
double r3646615 = r3646613 + r3646614;
double r3646616 = c;
double r3646617 = r3646615 + r3646616;
double r3646618 = 2.0;
double r3646619 = r3646617 / r3646618;
double r3646620 = r3646619 - r3646613;
double r3646621 = r3646619 * r3646620;
double r3646622 = r3646619 - r3646614;
double r3646623 = r3646621 * r3646622;
double r3646624 = r3646619 - r3646616;
double r3646625 = r3646623 * r3646624;
double r3646626 = sqrt(r3646625);
return r3646626;
}