✅ The verified answer to this question is available below. Our community-reviewed solutions help you understand the material better.
struct S { int a; struct S *b; struct S *prev; };
struct S *x = malloc(sizeof(struct S));
struct S *y = malloc(sizeof(struct S));
struct S *z = malloc(sizeof(struct S));
x->a = 1; x->b = z; x->prev = y;
z->a = 2; z->b = y; z->prev = x;
y->a = x; y->prev = z;
printf("%d", x->b->b->b->b->b->a);