double f(double a, double b, double c) {
double r2267922 = a;
double r2267923 = b;
double r2267924 = r2267922 + r2267923;
double r2267925 = c;
double r2267926 = r2267924 + r2267925;
double r2267927 = 2.0;
double r2267928 = r2267926 / r2267927;
double r2267929 = r2267928 - r2267922;
double r2267930 = r2267928 * r2267929;
double r2267931 = r2267928 - r2267923;
double r2267932 = r2267930 * r2267931;
double r2267933 = r2267928 - r2267925;
double r2267934 = r2267932 * r2267933;
double r2267935 = sqrt(r2267934);
return r2267935;
}