double f(double a, double b, double c) {
double r2655041 = a;
double r2655042 = b;
double r2655043 = r2655041 + r2655042;
double r2655044 = c;
double r2655045 = r2655043 + r2655044;
double r2655046 = 2.0;
double r2655047 = r2655045 / r2655046;
double r2655048 = r2655047 - r2655041;
double r2655049 = r2655047 * r2655048;
double r2655050 = r2655047 - r2655042;
double r2655051 = r2655049 * r2655050;
double r2655052 = r2655047 - r2655044;
double r2655053 = r2655051 * r2655052;
double r2655054 = sqrt(r2655053);
return r2655054;
}