text: #include <stl/algorithm>
  #include <stdio.h>
  
  using namespace stl;
  
  int main ()
  {
    printf ("Results of prevprm0_test:\n");
      
    int v1 [3] = {0,1,2};
  
    prev_permutation (v1,v1+3);
    
    for (int i=0;i<3;i++)  printf ("%d ",v1 [i]);
    printf ("\n");
      
    return 0;
  }
  