#include<stdio.h>
#include<stdlib.h>
typedef struct list
{
    int value;
    struct list *next;
}list;
void push(list **head,int data)
{
    list *tmp=(list*)malloc(sizeof(list));
    tmp->value=data;
    tmp->next=*head;
    *head=tmp;
}
int main(void)
{
    list *head;
    head=NULL;
    push(head,9);
}