2

#include<stdio.h>
typedef struct Node
{
    int data;
    struct Node *next;
}
node;

int main()
{
    node *start = (node *)malloc(sizeof(node));
    start->data = 1;
    start->next = NULL;

    node *secondFloor =(node *)malloc(sizeof(node));
    secondFloor->data = 2;
    secondFloor->next = NULL;

    node *thirdFloor =(node *)malloc(sizeof(node));
    thirdFloor->data = 6;
    thirdFloor->next = NULL;

    node *forthFloor =(node *)malloc(sizeof(node));
    forthFloor->data = 8;
    forthFloor->next = NULL;

    node *fifthFloor =(node *)malloc(sizeof(node));
    fifthFloor->data = 10;
    fifthFloor->next = NULL;

    start->next = secondFloor;
    secondFloor->next = thirdFloor;
    thirdFloor->next = forthFloor;
    forthFloor->next = fifthFloor;

    printf("start = %d data1: %d next: %d\n",start,start->data,start->next);
    printf("secondFloor = %d data2: %d next: %d\n",secondFloor,secondFloor->data,secondFloor->next);
    printf("thirdFloor = %d data3: %d next: %d\n",thirdFloor,thirdFloor->data,thirdFloor->next);
    printf("forthFloor = %d data3: %d next: %d\n",forthFloor,forthFloor->data,forthFloor->next);
    printf("fifthFloor = %d data3: %d next: %d\n",fifthFloor,fifthFloor->data,fifthFloor->next);

}