Dekhe dis tohh kothay shomossha :3 *Insert at nth*

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

node *head=NULL, *list=NULL;

void insert_at_nth(int a)
{

    node *N=(node*)malloc(sizeof(node));
    N->a=a;
    N->next=NULL;

    int n;
    scanf("%d", &n);

    if(n==1)
    {
        N->next=head;
        head=N;
        return;
    }
    else
    {
        list=head;
        n=n-2;
        while(n!=0 && list->next!=NULL)//while(p--)
        {
            list=list->next;
            n--;
        }
        N->next=list->next;
        list->next=N;
    }
}

void display()
{
    list=head;
    while(list!=NULL)
    {
        printf("Data = %d\n", list->a);
        list=list->next;
    }
}

int main()
{
    int x;
    printf("ENTER THE CASE:\n");
    scanf("%d", &x);
    if(x==0)
    {
        printf("Empty\n");
        return 0;
    }
        node *N=(node*)malloc(sizeof(node));
        printf("ENTER THE VALUE:\n");
        scanf("%d", &N->a);
        head=N;
        N->next=NULL;
        x=x-1;
        while(x--)
        {
            insert_at_nth();
        }
        display();
}