double f(double a, double b, double c) {
double r1753090 = a;
double r1753091 = b;
double r1753092 = r1753090 + r1753091;
double r1753093 = c;
double r1753094 = r1753092 + r1753093;
double r1753095 = 2.0;
double r1753096 = r1753094 / r1753095;
double r1753097 = r1753096 - r1753090;
double r1753098 = r1753096 * r1753097;
double r1753099 = r1753096 - r1753091;
double r1753100 = r1753098 * r1753099;
double r1753101 = r1753096 - r1753093;
double r1753102 = r1753100 * r1753101;
double r1753103 = sqrt(r1753102);
return r1753103;
}