double f(double a, double b, double c) {
double r3257444 = a;
double r3257445 = b;
double r3257446 = r3257444 + r3257445;
double r3257447 = c;
double r3257448 = r3257446 + r3257447;
double r3257449 = 2.0;
double r3257450 = r3257448 / r3257449;
double r3257451 = r3257450 - r3257444;
double r3257452 = r3257450 * r3257451;
double r3257453 = r3257450 - r3257445;
double r3257454 = r3257452 * r3257453;
double r3257455 = r3257450 - r3257447;
double r3257456 = r3257454 * r3257455;
double r3257457 = sqrt(r3257456);
return r3257457;
}