double f(double a, double b, double c) {
double r15293729 = a;
double r15293730 = b;
double r15293731 = r15293729 + r15293730;
double r15293732 = c;
double r15293733 = r15293731 + r15293732;
double r15293734 = 2.0;
double r15293735 = r15293733 / r15293734;
double r15293736 = r15293735 - r15293729;
double r15293737 = r15293735 * r15293736;
double r15293738 = r15293735 - r15293730;
double r15293739 = r15293737 * r15293738;
double r15293740 = r15293735 - r15293732;
double r15293741 = r15293739 * r15293740;
double r15293742 = sqrt(r15293741);
return r15293742;
}