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

struct ListNode {
  int data;
  struct ListNode *next;
};

struct ListNode first;
struct ListNode second;
struct ListNode third;

// Print a list
void printList(struct ListNode *node) {
  while (node != NULL) {
    printf("%d ", node->data);
    node = node->next;
  }
  printf("\n");
}

// Connect first, second, and third into a linked list.
void makeList(int *values) {
  first.data  = values[0];
  first.next  = &second;
  second.data = values[1];
  second.next = &third;
  third.data  = values[2];
  third.next  = NULL;
}

// The program starts from here
int main(int argc, char *argv[]) {
  if (argc != 4) {
    printf("You gave me %d inputs, I expected 3\n", argc);
    return 1;
  }

  // Read three values from the command line
  int values[3];
  values[0] = strtol(argv[1], NULL, 0);
  values[1] = strtol(argv[2], NULL, 0);
  values[2] = strtol(argv[3], NULL, 0);
  makeList(values);

  // Print those three values
  printList(&first);

  printf("Exiting\n");
  return 0;
}