double f(double a, double b, double c) {
double r1055393 = a;
double r1055394 = b;
double r1055395 = r1055393 + r1055394;
double r1055396 = c;
double r1055397 = r1055395 + r1055396;
double r1055398 = 2.0;
double r1055399 = r1055397 / r1055398;
double r1055400 = r1055399 - r1055393;
double r1055401 = r1055399 * r1055400;
double r1055402 = r1055399 - r1055394;
double r1055403 = r1055401 * r1055402;
double r1055404 = r1055399 - r1055396;
double r1055405 = r1055403 * r1055404;
double r1055406 = sqrt(r1055405);
return r1055406;
}