double *high_card_probability ( int n );
int *high_card_shuffle ( int n, int &seed );
double high_card_simulation ( int deck_size, int skip_num, int trial_num,
  int &seed );
int i4_power ( int i, int j );
int i4_uniform_ab ( int a, int b, int &seed );
int i4vec_max ( int n, int a[] );
void i4vec_print ( int n, int a[], string title );
int *perm_uniform_new ( int n, int &seed );
void timestamp ( );