double f(double a, double b, double c) {
double r1269200 = a;
double r1269201 = b;
double r1269202 = r1269200 + r1269201;
double r1269203 = c;
double r1269204 = r1269202 + r1269203;
double r1269205 = 2.0;
double r1269206 = r1269204 / r1269205;
double r1269207 = r1269206 - r1269200;
double r1269208 = r1269206 * r1269207;
double r1269209 = r1269206 - r1269201;
double r1269210 = r1269208 * r1269209;
double r1269211 = r1269206 - r1269203;
double r1269212 = r1269210 * r1269211;
double r1269213 = sqrt(r1269212);
return r1269213;
}