double f(double a, double b, double c) {
double r8536167 = a;
double r8536168 = b;
double r8536169 = r8536167 + r8536168;
double r8536170 = c;
double r8536171 = r8536169 + r8536170;
double r8536172 = 2.0;
double r8536173 = r8536171 / r8536172;
double r8536174 = r8536173 - r8536167;
double r8536175 = r8536173 * r8536174;
double r8536176 = r8536173 - r8536168;
double r8536177 = r8536175 * r8536176;
double r8536178 = r8536173 - r8536170;
double r8536179 = r8536177 * r8536178;
double r8536180 = sqrt(r8536179);
return r8536180;
}