double f(double a, double b, double c) {
double r2730099 = a;
double r2730100 = b;
double r2730101 = r2730099 + r2730100;
double r2730102 = c;
double r2730103 = r2730101 + r2730102;
double r2730104 = 2.0;
double r2730105 = r2730103 / r2730104;
double r2730106 = r2730105 - r2730099;
double r2730107 = r2730105 * r2730106;
double r2730108 = r2730105 - r2730100;
double r2730109 = r2730107 * r2730108;
double r2730110 = r2730105 - r2730102;
double r2730111 = r2730109 * r2730110;
double r2730112 = sqrt(r2730111);
return r2730112;
}