double f(double a, double b, double c) {
double r1468151 = a;
double r1468152 = b;
double r1468153 = r1468151 + r1468152;
double r1468154 = c;
double r1468155 = r1468153 + r1468154;
double r1468156 = 2.0;
double r1468157 = r1468155 / r1468156;
double r1468158 = r1468157 - r1468151;
double r1468159 = r1468157 * r1468158;
double r1468160 = r1468157 - r1468152;
double r1468161 = r1468159 * r1468160;
double r1468162 = r1468157 - r1468154;
double r1468163 = r1468161 * r1468162;
double r1468164 = sqrt(r1468163);
return r1468164;
}