double f(double a, double b, double c) {
double r12924279 = a;
double r12924280 = b;
double r12924281 = r12924279 + r12924280;
double r12924282 = c;
double r12924283 = r12924281 + r12924282;
double r12924284 = 2.0;
double r12924285 = r12924283 / r12924284;
double r12924286 = r12924285 - r12924279;
double r12924287 = r12924285 * r12924286;
double r12924288 = r12924285 - r12924280;
double r12924289 = r12924287 * r12924288;
double r12924290 = r12924285 - r12924282;
double r12924291 = r12924289 * r12924290;
double r12924292 = sqrt(r12924291);
return r12924292;
}