double f(double a, double b, double c) {
double r2755457 = a;
double r2755458 = b;
double r2755459 = r2755457 + r2755458;
double r2755460 = c;
double r2755461 = r2755459 + r2755460;
double r2755462 = 2.0;
double r2755463 = r2755461 / r2755462;
double r2755464 = r2755463 - r2755457;
double r2755465 = r2755463 * r2755464;
double r2755466 = r2755463 - r2755458;
double r2755467 = r2755465 * r2755466;
double r2755468 = r2755463 - r2755460;
double r2755469 = r2755467 * r2755468;
double r2755470 = sqrt(r2755469);
return r2755470;
}