double f(double a, double b, double c) {
double r1043011 = a;
double r1043012 = b;
double r1043013 = r1043011 + r1043012;
double r1043014 = c;
double r1043015 = r1043013 + r1043014;
double r1043016 = 2.0;
double r1043017 = r1043015 / r1043016;
double r1043018 = r1043017 - r1043011;
double r1043019 = r1043017 * r1043018;
double r1043020 = r1043017 - r1043012;
double r1043021 = r1043019 * r1043020;
double r1043022 = r1043017 - r1043014;
double r1043023 = r1043021 * r1043022;
double r1043024 = sqrt(r1043023);
return r1043024;
}