double f(double a, double b, double c) {
double r4707419 = a;
double r4707420 = b;
double r4707421 = r4707419 + r4707420;
double r4707422 = c;
double r4707423 = r4707421 + r4707422;
double r4707424 = 2.0;
double r4707425 = r4707423 / r4707424;
double r4707426 = r4707425 - r4707419;
double r4707427 = r4707425 * r4707426;
double r4707428 = r4707425 - r4707420;
double r4707429 = r4707427 * r4707428;
double r4707430 = r4707425 - r4707422;
double r4707431 = r4707429 * r4707430;
double r4707432 = sqrt(r4707431);
return r4707432;
}