double f(double a, double b, double c) {
double r4678614 = a;
double r4678615 = b;
double r4678616 = r4678614 + r4678615;
double r4678617 = c;
double r4678618 = r4678616 + r4678617;
double r4678619 = 2.0;
double r4678620 = r4678618 / r4678619;
double r4678621 = r4678620 - r4678614;
double r4678622 = r4678620 * r4678621;
double r4678623 = r4678620 - r4678615;
double r4678624 = r4678622 * r4678623;
double r4678625 = r4678620 - r4678617;
double r4678626 = r4678624 * r4678625;
double r4678627 = sqrt(r4678626);
return r4678627;
}