double f(double a, double b, double c) {
double r7631205 = a;
double r7631206 = b;
double r7631207 = r7631205 + r7631206;
double r7631208 = c;
double r7631209 = r7631207 + r7631208;
double r7631210 = 2.0;
double r7631211 = r7631209 / r7631210;
double r7631212 = r7631211 - r7631205;
double r7631213 = r7631211 * r7631212;
double r7631214 = r7631211 - r7631206;
double r7631215 = r7631213 * r7631214;
double r7631216 = r7631211 - r7631208;
double r7631217 = r7631215 * r7631216;
double r7631218 = sqrt(r7631217);
return r7631218;
}