double f(double a, double b, double c) {
double r3712039 = a;
double r3712040 = b;
double r3712041 = r3712039 + r3712040;
double r3712042 = c;
double r3712043 = r3712041 + r3712042;
double r3712044 = 2.0;
double r3712045 = r3712043 / r3712044;
double r3712046 = r3712045 - r3712039;
double r3712047 = r3712045 * r3712046;
double r3712048 = r3712045 - r3712040;
double r3712049 = r3712047 * r3712048;
double r3712050 = r3712045 - r3712042;
double r3712051 = r3712049 * r3712050;
double r3712052 = sqrt(r3712051);
return r3712052;
}