double f(double a, double b, double c) {
double r1041820 = a;
double r1041821 = b;
double r1041822 = r1041820 + r1041821;
double r1041823 = c;
double r1041824 = r1041822 + r1041823;
double r1041825 = 2.0;
double r1041826 = r1041824 / r1041825;
double r1041827 = r1041826 - r1041820;
double r1041828 = r1041826 * r1041827;
double r1041829 = r1041826 - r1041821;
double r1041830 = r1041828 * r1041829;
double r1041831 = r1041826 - r1041823;
double r1041832 = r1041830 * r1041831;
double r1041833 = sqrt(r1041832);
return r1041833;
}