#include <limits.h>
#include "abs.h"

/*@
 requires 0 < n < UINT_MAX;
 requires \valid_read(tab+(0..n-1));
 terminates \true;
 ensures \forall integer a,b; 0 <= a < b < n ==> \result >= abs(tab[a]-tab[b]);
 */
int max_dist(int *tab, unsigned int n);