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96 changes: 96 additions & 0 deletions SuyogKumawat.md
Original file line number Diff line number Diff line change
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#Deleted Duplicates from sorted Linked list

#include<stdio.h> //header files
#include<stdlib.h>
//Creating a Node
struct Node
{
int data;
struct Node* next;
};

/* The function removes duplicates from a sorted list */
void removeDuplicates(struct Node* head)
{
/* Pointer to traverse the linked list */
struct Node* current = head;

/* Pointer to store the next pointer of a node to be deleted*/
struct Node* next_next;

/* do nothing if the list is empty */
if (current == NULL)
return;

/* Traverse the list till last node */
while (current->next != NULL)
{
/* Compare current node with next node */
if (current->data == current->next->data)
{
/* The sequence of steps is important*/
next_next = current->next->next;
free(current->next);
current->next = next_next;
}
else /* This is tricky: only advance if no deletion */
{
current = current->next;
}
}
}

/* UTILITY FUNCTIONS */
/* Function to insert a node at the beginging of the linked list */
void push(struct Node** head_ref, int new_data)
{
/* allocate node */
struct Node* new_node =
(struct Node*) malloc(sizeof(struct Node));

/* put in the data */
new_node->data = new_data;

/* link the old list off the new node */
new_node->next = (*head_ref);

/* move the head to point to the new node */
(*head_ref) = new_node;
}

/* Function to print nodes in a given linked list */
void printList(struct Node *node)
{
while (node!=NULL)
{
printf("%d ", node->data);
node = node->next;
}
}

/* Driver program to test above functions*/
int main()
{
/* Start with the empty list */
struct Node* head = NULL;

/* Let us create a sorted linked list to test the functions
Created linked list will be 11->11->11->13->13->20 */
push(&head, 20);
push(&head, 13);
push(&head, 13);
push(&head, 11);
push(&head, 11);
push(&head, 11);

printf("\n Linked list before duplicate removal ");
printList(head);

/* Remove duplicates from linked list */
removeDuplicates(head);

printf("\n Linked list after duplicate removal ");
printList(head);

return 0;
}