double f(double a, double b, double c) {
double r28224492 = a;
double r28224493 = b;
double r28224494 = r28224492 + r28224493;
double r28224495 = c;
double r28224496 = r28224494 + r28224495;
double r28224497 = 2.0;
double r28224498 = r28224496 / r28224497;
double r28224499 = r28224498 - r28224492;
double r28224500 = r28224498 * r28224499;
double r28224501 = r28224498 - r28224493;
double r28224502 = r28224500 * r28224501;
double r28224503 = r28224498 - r28224495;
double r28224504 = r28224502 * r28224503;
double r28224505 = sqrt(r28224504);
return r28224505;
}