double f(double a, double b, double c) {
double r4677014 = a;
double r4677015 = b;
double r4677016 = r4677014 + r4677015;
double r4677017 = c;
double r4677018 = r4677016 + r4677017;
double r4677019 = 2.0;
double r4677020 = r4677018 / r4677019;
double r4677021 = r4677020 - r4677014;
double r4677022 = r4677020 * r4677021;
double r4677023 = r4677020 - r4677015;
double r4677024 = r4677022 * r4677023;
double r4677025 = r4677020 - r4677017;
double r4677026 = r4677024 * r4677025;
double r4677027 = sqrt(r4677026);
return r4677027;
}