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

struct node{

    struct node *prevPtr;
    int data;
    struct node *nextPtr;

};

int printList(struct node head){

    int i;
    struct node *tempPtr= malloc(sizeof(struct node));
    tempPtr->prevPtr= NULL;
    tempPtr->data= NULL;
    tempPtr->nextPtr= NULL;

    tempPtr->data= head->data;
    tempPtr->nextPtr= head->nextPtr;


    for(i=0;;++i){

        if(tempPtr->data!=NULL) printf("%d",tempPtr->data);
        else {printf("Bitti");break;}

        tempPtr->data= tempPtr->nextPtr->data;
        tempPtr->nextPtr= tempPtr->nextPtr->nextPtr;
    }
}


int main()
{

    struct node *head= malloc(sizeof(struct node));
    head->prevPtr=NULL;
    head->data=0;
    head->nextPtr=NULL;

    struct node *body_1= malloc(sizeof(struct node));
    head->nextPtr=body_1;
    body_1->prevPtr=head;
    body_1->data=1;
    body_1->nextPtr=NULL;

    struct node *body_2= malloc(sizeof(struct node));
    body_1->nextPtr=body_2;
    body_2->prevPtr=body_1;
    body_2->data=2;
    body_2->nextPtr=NULL;

    struct node *body_3= malloc(sizeof(struct node));
    body_2->nextPtr=body_3;
    body_3->prevPtr=body_2;
    body_3->data=3;
    body_3->nextPtr=NULL;

    struct node *body_4= malloc(sizeof(struct node));
    body_3->nextPtr=body_4;
    body_4->prevPtr=body_3;
    body_4->data=4;
    body_4->nextPtr=NULL;

    printList(*head);


    return 0;
}