Random 100000 C1;
  Uniform 0.0 1.0.
Let C2 = (C1 <= 1/2)*(-1+sqrt(2*C1))+(1 - sqrt(2-2*C1))*(C1 > 1/2)
Histogram C2;
  Density;
  MidPoint;
  Bar;
  ScFrame;
  ScAnnotation.