double f(double a, double b, double c) {
double r41983645 = a;
double r41983646 = b;
double r41983647 = r41983645 + r41983646;
double r41983648 = c;
double r41983649 = r41983647 + r41983648;
double r41983650 = 2.0;
double r41983651 = r41983649 / r41983650;
double r41983652 = r41983651 - r41983645;
double r41983653 = r41983651 * r41983652;
double r41983654 = r41983651 - r41983646;
double r41983655 = r41983653 * r41983654;
double r41983656 = r41983651 - r41983648;
double r41983657 = r41983655 * r41983656;
double r41983658 = sqrt(r41983657);
return r41983658;
}