double f(double a, double b, double c) {
double r2225523 = a;
double r2225524 = b;
double r2225525 = r2225523 + r2225524;
double r2225526 = c;
double r2225527 = r2225525 + r2225526;
double r2225528 = 2.0;
double r2225529 = r2225527 / r2225528;
double r2225530 = r2225529 - r2225523;
double r2225531 = r2225529 * r2225530;
double r2225532 = r2225529 - r2225524;
double r2225533 = r2225531 * r2225532;
double r2225534 = r2225529 - r2225526;
double r2225535 = r2225533 * r2225534;
double r2225536 = sqrt(r2225535);
return r2225536;
}