#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>

struct Item {
  int value;
  uint32_t next_pointer;
};

int main(int argc, char *argv[]) {
    int fd = open(argv[1], O_RDONLY);


    if (fd != -1) {

        struct Item cur;

        do{
            if (read(fd, &cur, sizeof(cur)) > 0){
                printf("%d\n",cur.value);
                lseek(fd, cur.next_pointer, SEEK_SET);
            } else {
                close(fd);
                return 0;
            }
        } while(cur.next_pointer != 0);

        close(fd);

    }
    return 0;
}