double f(double a, double b, double c) {
double r1763982 = a;
double r1763983 = b;
double r1763984 = r1763982 + r1763983;
double r1763985 = c;
double r1763986 = r1763984 + r1763985;
double r1763987 = 2.0;
double r1763988 = r1763986 / r1763987;
double r1763989 = r1763988 - r1763982;
double r1763990 = r1763988 * r1763989;
double r1763991 = r1763988 - r1763983;
double r1763992 = r1763990 * r1763991;
double r1763993 = r1763988 - r1763985;
double r1763994 = r1763992 * r1763993;
double r1763995 = sqrt(r1763994);
return r1763995;
}