import "stdio.h";
import "stdlib.h";

type SList struct {
	value int;
	next *SList;
};

func SListNode(value int) *SList
{
	var n *SList = stdlib.malloc(sizeof(type SList));
	n.value = value;
	n.next = nil;
	return n;
}

func SListPush(head **SList, value int)
{
	if *head == nil {
		*head = SListNode(value);
		return;
	}

	n := SListNode(value);
	n.next = *head;
	*head = n;
}

func SListPop(head **SList) (value int)
{
	if *head != nil {
		cur := *head;
		value = cur.value;
		*head = cur.next;
		stdlib.free(cur);
	}
}

func main(argc int, argv **byte) int
{
	var list *SList;
	for i := 0; i < 5; i++ {
		SListPush(&list, i*10);
	}
	for i := 0; i < 5; i++ {
		v := SListPop(&list);
		stdio.printf("%d\n", v);
	}
	return 0;
}