double f(double a, double b, double c) {
double r1485807 = a;
double r1485808 = b;
double r1485809 = r1485807 + r1485808;
double r1485810 = c;
double r1485811 = r1485809 + r1485810;
double r1485812 = 2.0;
double r1485813 = r1485811 / r1485812;
double r1485814 = r1485813 - r1485807;
double r1485815 = r1485813 * r1485814;
double r1485816 = r1485813 - r1485808;
double r1485817 = r1485815 * r1485816;
double r1485818 = r1485813 - r1485810;
double r1485819 = r1485817 * r1485818;
double r1485820 = sqrt(r1485819);
return r1485820;
}