double f(double a, double b, double c) {
double r3123354 = a;
double r3123355 = b;
double r3123356 = r3123354 + r3123355;
double r3123357 = c;
double r3123358 = r3123356 + r3123357;
double r3123359 = 2.0;
double r3123360 = r3123358 / r3123359;
double r3123361 = r3123360 - r3123354;
double r3123362 = r3123360 * r3123361;
double r3123363 = r3123360 - r3123355;
double r3123364 = r3123362 * r3123363;
double r3123365 = r3123360 - r3123357;
double r3123366 = r3123364 * r3123365;
double r3123367 = sqrt(r3123366);
return r3123367;
}