double f(double a, double b, double c) {
double r1784881 = a;
double r1784882 = b;
double r1784883 = r1784881 + r1784882;
double r1784884 = c;
double r1784885 = r1784883 + r1784884;
double r1784886 = 2.0;
double r1784887 = r1784885 / r1784886;
double r1784888 = r1784887 - r1784881;
double r1784889 = r1784887 * r1784888;
double r1784890 = r1784887 - r1784882;
double r1784891 = r1784889 * r1784890;
double r1784892 = r1784887 - r1784884;
double r1784893 = r1784891 * r1784892;
double r1784894 = sqrt(r1784893);
return r1784894;
}