double f(double a, double b, double c) {
double r3946754 = a;
double r3946755 = b;
double r3946756 = r3946754 + r3946755;
double r3946757 = c;
double r3946758 = r3946756 + r3946757;
double r3946759 = 2.0;
double r3946760 = r3946758 / r3946759;
double r3946761 = r3946760 - r3946754;
double r3946762 = r3946760 * r3946761;
double r3946763 = r3946760 - r3946755;
double r3946764 = r3946762 * r3946763;
double r3946765 = r3946760 - r3946757;
double r3946766 = r3946764 * r3946765;
double r3946767 = sqrt(r3946766);
return r3946767;
}