How do you sort a Linked List (singly connected) in O(n)
please mail to pawan.10k@gmail.com if u can find an
anser...i m desperate to knw...

Answer Posted / sunil gupta

#include<stdio.h>
#include<conio.h>
#include<malloc.h>
typedef struct node
{
int info;
struct node *next;
}node;
node *temp,*ptr,*t=NULL,*end=NULL;
node *start=NULL;

void main()
{
int n,i,item;
clrscr();
i=0;
printf("enter num of node");
scanf("%d",&n);
while(n>0)
{
temp=(node*)malloc(sizeof(node));
temp->next=NULL;

printf("enter info");
scanf("%d",&item);
temp->info=item;
if(start==NULL)
{
start=temp;
}
else
{
ptr=start;
while(ptr->next!=NULL)
{

ptr=ptr->next;
}
ptr->next=temp;

} //else
n--;
}

ptr=start;
while(ptr!=NULL)
{
printf("%d",ptr->info);
ptr=ptr->next;
}
t=start;
while(t!=NULL)
{
ptr=t->next;
while(ptr!=NULL)
{
if(t->info>ptr->info)
{
temp->info=t->info;
t->info=ptr->info;
ptr->info=temp->info;
}
ptr=ptr->next;
}
t=t->next;
}

ptr=start;
while(ptr!=NULL)
{
printf("\n%d",ptr->info);
ptr=ptr->next;
}
getch();
}

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