double f(double a, double b, double c) {
double r1314018 = a;
double r1314019 = b;
double r1314020 = r1314018 + r1314019;
double r1314021 = c;
double r1314022 = r1314020 + r1314021;
double r1314023 = 2.0;
double r1314024 = r1314022 / r1314023;
double r1314025 = r1314024 - r1314018;
double r1314026 = r1314024 * r1314025;
double r1314027 = r1314024 - r1314019;
double r1314028 = r1314026 * r1314027;
double r1314029 = r1314024 - r1314021;
double r1314030 = r1314028 * r1314029;
double r1314031 = sqrt(r1314030);
return r1314031;
}