double f(double a, double b, double c) {
double r4180836 = a;
double r4180837 = b;
double r4180838 = r4180836 + r4180837;
double r4180839 = c;
double r4180840 = r4180838 + r4180839;
double r4180841 = 2.0;
double r4180842 = r4180840 / r4180841;
double r4180843 = r4180842 - r4180836;
double r4180844 = r4180842 * r4180843;
double r4180845 = r4180842 - r4180837;
double r4180846 = r4180844 * r4180845;
double r4180847 = r4180842 - r4180839;
double r4180848 = r4180846 * r4180847;
double r4180849 = sqrt(r4180848);
return r4180849;
}