double f(double a, double b, double c) {
double r2511670 = a;
double r2511671 = b;
double r2511672 = r2511670 + r2511671;
double r2511673 = c;
double r2511674 = r2511672 + r2511673;
double r2511675 = 2.0;
double r2511676 = r2511674 / r2511675;
double r2511677 = r2511676 - r2511670;
double r2511678 = r2511676 * r2511677;
double r2511679 = r2511676 - r2511671;
double r2511680 = r2511678 * r2511679;
double r2511681 = r2511676 - r2511673;
double r2511682 = r2511680 * r2511681;
double r2511683 = sqrt(r2511682);
return r2511683;
}