void i4vec_copy ( int n, int a1[], int a2[] );
int *i4vec_copy_new ( int n, int a1[] );
int i4vec_dot_product ( int n, int x[], int y[] );
int i4vec_sum ( int n, int a[] );
void partition_brute ( int n, int w[], int c[], int *discrepancy );
int partition_count ( int n, int w[] );
void subset_next ( int n, int t[], int *rank );
void timestamp ( );