double f(double a, double b, double c) {
double r2269579 = a;
double r2269580 = b;
double r2269581 = r2269579 + r2269580;
double r2269582 = c;
double r2269583 = r2269581 + r2269582;
double r2269584 = 2.0;
double r2269585 = r2269583 / r2269584;
double r2269586 = r2269585 - r2269579;
double r2269587 = r2269585 * r2269586;
double r2269588 = r2269585 - r2269580;
double r2269589 = r2269587 * r2269588;
double r2269590 = r2269585 - r2269582;
double r2269591 = r2269589 * r2269590;
double r2269592 = sqrt(r2269591);
return r2269592;
}