double f(double a, double b, double c) {
double r1019842 = a;
double r1019843 = b;
double r1019844 = r1019842 + r1019843;
double r1019845 = c;
double r1019846 = r1019844 + r1019845;
double r1019847 = 2.0;
double r1019848 = r1019846 / r1019847;
double r1019849 = r1019848 - r1019842;
double r1019850 = r1019848 * r1019849;
double r1019851 = r1019848 - r1019843;
double r1019852 = r1019850 * r1019851;
double r1019853 = r1019848 - r1019845;
double r1019854 = r1019852 * r1019853;
double r1019855 = sqrt(r1019854);
return r1019855;
}