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

typedef int ElementType;

struct NodeStruct {
  ElementType elem;
  struct NodeStruct* next;
};

typedef struct NodeStruct NodeType;

void insert(NodeType** node, ElementType elem) {
  NodeType* newNode;
  newNode = malloc(sizeof(newNode));
  newNode->elem = elem;
  newNode->next = (*node);
  (*node) = newNode;
}

void print(NodeType* list) {
  printf("elem: %d\n",list->elem);
  print(list->next);
}

int main() {
  NodeType* list = 0;
  insert(&list,10);
  insert(&list,11);
  insert(&list,12);
  print(list);
}