[anton@notebook tmp]$ cat main.c
#include <stdlib.h>
#include <stdio.h>

typedef struct item {
  int data;
  struct item *next;
} item;


int main()

{
  struct item *first = NULL;
  struct item *tmp;
  int n;



  while (scanf("%d", &n)!= EOF) {

    tmp = (item *)malloc(sizeof(item));

    tmp->data = n;

    tmp->next = first;
    first = tmp;
  }
  tmp = first;


  while (tmp != NULL) {
    printf("%d", tmp->data);
    tmp = tmp->next;
  }

  return 0;
}
[anton@notebook tmp]$ gcc main.c -o main
[anton@notebook tmp]$ ./main
1
2
3
4
5
54321[anton@notebook tmp]$