double f(double a, double b, double c) {
double r7501437 = a;
double r7501438 = b;
double r7501439 = r7501437 + r7501438;
double r7501440 = c;
double r7501441 = r7501439 + r7501440;
double r7501442 = 2.0;
double r7501443 = r7501441 / r7501442;
double r7501444 = r7501443 - r7501437;
double r7501445 = r7501443 * r7501444;
double r7501446 = r7501443 - r7501438;
double r7501447 = r7501445 * r7501446;
double r7501448 = r7501443 - r7501440;
double r7501449 = r7501447 * r7501448;
double r7501450 = sqrt(r7501449);
return r7501450;
}