#include <fcntl.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

void print(int fd, int32_t cur_ind, int32_t *ptr, int32_t *buf) {
    int read_res;
    void *cur_buf = buf;
    int cur_size = 0;
    while ((read_res = read(fd, cur_buf, 12 - cur_size)) > 0) {
        cur_buf = cur_buf + read_res;
        cur_size += read_res;
    }
    *ptr = cur_ind + 1;
    if (*(buf + 2) != 0) {
        lseek(fd, (*(buf + 2) - *ptr) * 12, SEEK_CUR);
        *ptr = *(buf + 2);
        print(fd, *(buf + 2), ptr, buf);
    }

    printf("%d ", *buf);
    if (*(buf + 1) != 0) {
        lseek(fd, (*(buf + 1) - *ptr) * 12, SEEK_CUR);
        *ptr = *(buf + 1);
        print(fd, *(buf + 1), ptr, buf);
    }
    return;
}

int main(int argc, char *argv[]) {
    int fd = open(argv[1], O_RDONLY);
    int32_t *buf = malloc(12);
    int32_t cur_ind = 0;
    int32_t cur_pos = 0;
    print(fd, 0, &cur_pos, buf);
    printf("\n");
    free(buf);
}