double f(double a, double b, double c) {
double r2072818 = a;
double r2072819 = b;
double r2072820 = r2072818 + r2072819;
double r2072821 = c;
double r2072822 = r2072820 + r2072821;
double r2072823 = 2.0;
double r2072824 = r2072822 / r2072823;
double r2072825 = r2072824 - r2072818;
double r2072826 = r2072824 * r2072825;
double r2072827 = r2072824 - r2072819;
double r2072828 = r2072826 * r2072827;
double r2072829 = r2072824 - r2072821;
double r2072830 = r2072828 * r2072829;
double r2072831 = sqrt(r2072830);
return r2072831;
}