double f(double a, double b, double c) {
double r1765027 = a;
double r1765028 = b;
double r1765029 = r1765027 + r1765028;
double r1765030 = c;
double r1765031 = r1765029 + r1765030;
double r1765032 = 2.0;
double r1765033 = r1765031 / r1765032;
double r1765034 = r1765033 - r1765027;
double r1765035 = r1765033 * r1765034;
double r1765036 = r1765033 - r1765028;
double r1765037 = r1765035 * r1765036;
double r1765038 = r1765033 - r1765030;
double r1765039 = r1765037 * r1765038;
double r1765040 = sqrt(r1765039);
return r1765040;
}