double f(double a, double b, double c) {
double r3554773 = a;
double r3554774 = b;
double r3554775 = r3554773 + r3554774;
double r3554776 = c;
double r3554777 = r3554775 + r3554776;
double r3554778 = 2.0;
double r3554779 = r3554777 / r3554778;
double r3554780 = r3554779 - r3554773;
double r3554781 = r3554779 * r3554780;
double r3554782 = r3554779 - r3554774;
double r3554783 = r3554781 * r3554782;
double r3554784 = r3554779 - r3554776;
double r3554785 = r3554783 * r3554784;
double r3554786 = sqrt(r3554785);
return r3554786;
}