double f(double a, double b, double c) {
double r2417258 = a;
double r2417259 = b;
double r2417260 = r2417258 + r2417259;
double r2417261 = c;
double r2417262 = r2417260 + r2417261;
double r2417263 = 2.0;
double r2417264 = r2417262 / r2417263;
double r2417265 = r2417264 - r2417258;
double r2417266 = r2417264 * r2417265;
double r2417267 = r2417264 - r2417259;
double r2417268 = r2417266 * r2417267;
double r2417269 = r2417264 - r2417261;
double r2417270 = r2417268 * r2417269;
double r2417271 = sqrt(r2417270);
return r2417271;
}