/* rand.c   by Michael Thorpe   1999-02-14 */

#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <time.h>
#include <unistd.h>

int main(int argc,char **argv) {
   int i;
   if(argc != 1 && !(argc==2 && isdigit(argv[1][0]) && argv[1][0] != '0')) {
      printf("usage: %s [<#>]\n",argv[0]);
      return(1);
   }
   srand((int)time(0)+(int)getpid());
   i=rand();
   if(argc==2)
      i%=atol(argv[1]);
   printf("%d\n",i);
   return(0);
}