double f(double a, double b, double c) {
double r1261239 = a;
double r1261240 = b;
double r1261241 = r1261239 + r1261240;
double r1261242 = c;
double r1261243 = r1261241 + r1261242;
double r1261244 = 2.0;
double r1261245 = r1261243 / r1261244;
double r1261246 = r1261245 - r1261239;
double r1261247 = r1261245 * r1261246;
double r1261248 = r1261245 - r1261240;
double r1261249 = r1261247 * r1261248;
double r1261250 = r1261245 - r1261242;
double r1261251 = r1261249 * r1261250;
double r1261252 = sqrt(r1261251);
return r1261252;
}