double f(double a, double b, double c) {
double r5369745 = a;
double r5369746 = b;
double r5369747 = r5369745 + r5369746;
double r5369748 = c;
double r5369749 = r5369747 + r5369748;
double r5369750 = 2.0;
double r5369751 = r5369749 / r5369750;
double r5369752 = r5369751 - r5369745;
double r5369753 = r5369751 * r5369752;
double r5369754 = r5369751 - r5369746;
double r5369755 = r5369753 * r5369754;
double r5369756 = r5369751 - r5369748;
double r5369757 = r5369755 * r5369756;
double r5369758 = sqrt(r5369757);
return r5369758;
}