double f(double a, double b, double c) {
double r4123433 = a;
double r4123434 = b;
double r4123435 = r4123433 + r4123434;
double r4123436 = c;
double r4123437 = r4123435 + r4123436;
double r4123438 = 2.0;
double r4123439 = r4123437 / r4123438;
double r4123440 = r4123439 - r4123433;
double r4123441 = r4123439 * r4123440;
double r4123442 = r4123439 - r4123434;
double r4123443 = r4123441 * r4123442;
double r4123444 = r4123439 - r4123436;
double r4123445 = r4123443 * r4123444;
double r4123446 = sqrt(r4123445);
return r4123446;
}