linked list & pointer to pointer

#include <stdio.h>
#include <stdlib.h>

typedef struct
{
    int data;
    struct unnod *urm;
} unnod;

int main()
{
    int x = 333;
    int *p = &x;
    int **pp = &p;
    int ***ppp = &pp;
    printf("%d", (***ppp));
    puts("");
    printf("%p", ppp);
    return 0;
}