Find a triplet from three linked lists with given sum

Find a pair with the given sum in three unsorted linked list. This pair must contain at least one element of all linked lists.

Example
----------
    List  A    5 → 2 → -2 → 1 → 3 → 6 → NULL
    List  B   -1 → 2 → 5 → 4 → 9 → -9 → NULL
    List  C    1 → 2 → 8 → 4 → 3 → 6 → NULL
    -----------------------------------------
    Sum : 22

    List  A    5 → 2 → -2 → 1 → 3 → 6 → NULL
               ↑
    List  B   -1 → 2 → 5 → 4 → 9 → -9 → NULL
                               ↑
    List  C    1 → 2 → 8 → 4 → 3 → 6 → NULL
                       ↑
    Triplet :  (5,9,8)

We can solve this problem by traversal of the linked list. Print a valid message when the valid list does not contain totals. Here given code implementation process.

/*
    C program for
    Find a triplet from three linked lists with given sum
*/
#include <stdio.h>
#include <stdlib.h>

// Linked List LinkNode
struct LinkNode
{
	int data;
	struct LinkNode *next;
};
// Singly linked list 
struct SingleLL
{
	struct LinkNode *head;
	struct LinkNode *tail;
};
// Returns the new linked list
struct SingleLL *newLinkedList()
{
	// Create memory of head and tail Nodes
	struct SingleLL *sll = 
      (struct SingleLL *) malloc(sizeof(struct SingleLL));
	if (sll == NULL)
	{
		printf("Memory overflow\n");
	}
	else
	{
		sll->head = NULL;
	}
	return sll;
}
// Handles the request of adding new node in linked list
void addNode(struct SingleLL *sll, int data)
{
	// Create dynamic node
	struct LinkNode *node = 
      (struct LinkNode *) malloc(sizeof(struct LinkNode));
	if (node == NULL)
	{
		printf("Memory overflow to Create LinkNode\n");
		return;
	}
	else
	{
		// Set initial node value
		node->data = data;
		node->next = NULL;
	}
	if (sll->head == NULL)
	{
		sll->head = node;
	}
	else
	{
		sll->tail->next = node;
	}
	sll->tail = node;
}
// Display linked list element
void display(struct LinkNode *node)
{
	if (node == NULL)
	{
		return;
	}
	struct LinkNode *temp = node;
	// iterating linked list elements
	while (temp != NULL)
	{
		printf(" %d →", temp->data);
		// Visit to next node
		temp = temp->next;
	}
	printf(" NULL\n");
}
void tripletOfSumK(struct LinkNode *l1, 
                   struct LinkNode *l2, 
                   struct LinkNode *l3, int k)
{
	if (l1 == NULL || l2 == NULL || l3 == NULL)
	{
		printf(" Given Sum triplet not exist [Case Empty List]\n");
		return;
	}
	printf("\n Given Lists \n");
	display(l1);
	display(l2);
	display(l3);
	printf(" Sum : %d \n", k);
	struct LinkNode *t1 = l1;
	struct LinkNode *t2 = l2;
	struct LinkNode *t3 = l3;
	// Compare linked list node
	while (t1 != NULL)
	{
		while (t2 != NULL)
		{
			while (t3 != NULL)
			{
				if (t1->data + t2->data + t3->data == k)
				{
					printf(" Triplet :  (%d,%d,%d)", 
                           t1->data, t2->data, t3->data);
					return;
				}
				// Visit to next node
				t3 = t3->next;
			}
			// Visit to next node
			t2 = t2->next;
			t3 = l3;
		}
		// Visit to next node
		t1 = t1->next;
		t2 = l2;
	}
	printf(" Triplet of sum %d not found \n", k);
}
int main(int argc, char
	const *argv[])
{
	struct SingleLL *sll1 = newLinkedList();
	struct SingleLL *sll2 = newLinkedList();
	struct SingleLL *sll3 = newLinkedList();
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	addNode(sll1, 5);
	addNode(sll1, 2);
	addNode(sll1, -2);
	addNode(sll1, 1);
	addNode(sll1, 3);
	addNode(sll1, 6);
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	addNode(sll2, -1);
	addNode(sll2, 2);
	addNode(sll2, 5);
	addNode(sll2, 4);
	addNode(sll2, 9);
	addNode(sll2, -9);
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	addNode(sll3, 1);
	addNode(sll3, 2);
	addNode(sll3, 8);
	addNode(sll3, 4);
	addNode(sll3, 3);
	addNode(sll3, 6);
	int k = 22;
	// Test 
	tripletOfSumK(sll1->head, sll2->head, sll3->head, k);
	return 0;
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet :  (5,9,8)
/*
    Java program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode
{
    public int data;
    public LinkNode next;
    public LinkNode(int data)
    {
        this.data = data;
        this.next = null;
    }
}
public class SingleLL
{
    public LinkNode head;
    public LinkNode tail;
    public SingleLL()
    {
        this.head = null;
        this.tail = null;
    }
    // Add new Node at end of linked list 
    public void addNode(int data)
    {
        LinkNode node = new LinkNode(data);
        if (this.head == null)
        {
            this.head = node;
        }
        else
        {
            // Append the node at last position
            this.tail.next = node;
        }
        this.tail = node;
    }
    // Display linked list element
    public void display()
    {
        if (this.head == null)
        {
            return;
        }
        LinkNode temp = this.head;
        // iterating linked list elements
        while (temp != null)
        {
            System.out.print(" " + temp.data + " →");
            // Visit to next node
            temp = temp.next;
        }
        System.out.print(" NULL\n");
    }
    public void tripletOfSumK( SingleLL l2, SingleLL l3, int k)
    {
        if (this.head == null || l2.head == null || l3.head == null)
        {
          	//  [Case Empty List]
            System.out.print(" Given Sum triplet not exist\n");
            return;
        }
        System.out.print("\n Given Lists \n");
        this.display();
        l2.display();
        l3.display();
        System.out.print(" Sum : " + k + " \n");
        LinkNode t1 = this.head;
        LinkNode t2 = l2.head;
        LinkNode t3 = l3.head;
        // Compare linked list node
        while (t1 != null)
        {
            while (t2 != null)
            {
                while (t3 != null)
                {
                    if (t1.data + t2.data + t3.data == k)
                    {
                        System.out.print(" Triplet : (" + 
                            t1.data + "," + t2.data + "," + t3.data + ")");
                        return;
                    }
                    // Visit to next node
                    t3 = t3.next;
                }
                // Visit to next node
                t2 = t2.next;
                t3 = l3.head;
            }
            // Visit to next node
            t1 = t1.next;
            t2 = l2.head;
        }
        System.out.print(" Triplet of sum " + k + " not found \n");
    }
    public static void main(String[] args)
    {
        SingleLL sll1 = new SingleLL();
        SingleLL sll2 = new SingleLL();
        SingleLL sll3 = new SingleLL();


        // First linked list
        //  5 → 2 → -2 → 1 → 3 → 6 → NULL
        sll1.addNode(5);
        sll1.addNode(2);
        sll1.addNode(-2);
        sll1.addNode(1);
        sll1.addNode(3);
        sll1.addNode(6);
        // Second linked list
        //  -1 → 2 → 5 → 4 → 9 → -9 → NULL
        sll2.addNode(-1);
        sll2.addNode(2);
        sll2.addNode(5);
        sll2.addNode(4);
        sll2.addNode(9);
        sll2.addNode(-9);
        // Third linked list
        //  1 → 2 → 8 → 4 → 3 → 6 → NULL
        sll3.addNode(1);
        sll3.addNode(2);
        sll3.addNode(8);
        sll3.addNode(4);
        sll3.addNode(3);
        sll3.addNode(6);
        int k = 22;
        // Test 
        sll1.tripletOfSumK(sll2, sll3, k);
    }
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
// Include header file
#include <iostream>
using namespace std;
/*
    C++ program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode
{
	public: 
    int data;
	LinkNode *next;
	LinkNode(int data)
	{
		this->data = data;
		this->next = NULL;
	}
};
class SingleLL
{
	public: 
    LinkNode *head;
	LinkNode *tail;
	SingleLL()
	{
		this->head = NULL;
		this->tail = NULL;
	}
	// Add new Node at end of linked list 
	void addNode(int data)
	{
		LinkNode *node = new LinkNode(data);
		if (this->head == NULL)
		{
			this->head = node;
		}
		else
		{
			// Append the node at last position
			this->tail->next = node;
		}
		this->tail = node;
	}
	// Display linked list element
	void display()
	{
		if (this->head == NULL)
		{
			return;
		}
		LinkNode *temp = this->head;
		// iterating linked list elements
		while (temp != NULL)
		{
			cout << " " << temp->data << " →";
			// Visit to next node
			temp = temp->next;
		}
		cout << " NULL\n";
	}
	void tripletOfSumK(SingleLL *l2, 
                       SingleLL *l3, 
                       int k)
	{
		if (this->head == NULL || 
            l2->head == NULL || 
            l3->head == NULL)
		{
			//  [Case Empty List]
			cout << " Given Sum triplet not exist\n";
			return;
		}
		cout << "\n Given Lists \n";
		this->display();
		l2->display();
		l3->display();
		cout << " Sum : " << k << " \n";
		LinkNode *t1 = this->head;
		LinkNode *t2 = l2->head;
		LinkNode *t3 = l3->head;
		// Compare linked list node
		while (t1 != NULL)
		{
			while (t2 != NULL)
			{
				while (t3 != NULL)
				{
					if (t1->data + t2->data + t3->data == k)
					{
						cout << " Triplet : (" 
                      		 << t1->data << "," 
                             << t2->data << "," 
                             << t3->data << ")";
						return;
					}
					// Visit to next node
					t3 = t3->next;
				}
				// Visit to next node
				t2 = t2->next;
				t3 = l3->head;
			}
			// Visit to next node
			t1 = t1->next;
			t2 = l2->head;
		}
		cout << " Triplet of sum " << k << " not found \n";
	}
};
int main()
{
	SingleLL *sll1 = new SingleLL();
	SingleLL *sll2 = new SingleLL();
	SingleLL *sll3 = new SingleLL();
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1->addNode(5);
	sll1->addNode(2);
	sll1->addNode(-2);
	sll1->addNode(1);
	sll1->addNode(3);
	sll1->addNode(6);
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2->addNode(-1);
	sll2->addNode(2);
	sll2->addNode(5);
	sll2->addNode(4);
	sll2->addNode(9);
	sll2->addNode(-9);
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3->addNode(1);
	sll3->addNode(2);
	sll3->addNode(8);
	sll3->addNode(4);
	sll3->addNode(3);
	sll3->addNode(6);
	int k = 22;
	// Test 
	sll1->tripletOfSumK(sll2, sll3, k);
	return 0;
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
// Include namespace system
using System;
/*
    Csharp program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
public class LinkNode
{
	public int data;
	public LinkNode next;
	public LinkNode(int data)
	{
		this.data = data;
		this.next = null;
	}
}
public class SingleLL
{
	public LinkNode head;
	public LinkNode tail;
	public SingleLL()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	public void addNode(int data)
	{
		LinkNode node = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	public void display()
	{
		if (this.head == null)
		{
			return;
		}
		LinkNode temp = this.head;
		// iterating linked list elements
		while (temp != null)
		{
			Console.Write(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		Console.Write(" NULL\n");
	}
	public void tripletOfSumK(SingleLL l2, SingleLL l3, int k)
	{
		if (this.head == null || 
            l2.head == null || 
            l3.head == null)
		{
			//  [Case Empty List]
			Console.Write(" Given Sum triplet not exist\n");
			return;
		}
		Console.Write("\n Given Lists \n");
		this.display();
		l2.display();
		l3.display();
		Console.Write(" Sum : " + k + " \n");
		LinkNode t1 = this.head;
		LinkNode t2 = l2.head;
		LinkNode t3 = l3.head;
		// Compare linked list node
		while (t1 != null)
		{
			while (t2 != null)
			{
				while (t3 != null)
				{
					if (t1.data + t2.data + t3.data == k)
					{
						Console.Write(" Triplet : (" + 
                                      t1.data + "," +
                                      t2.data + "," + 
                                      t3.data + ")");
						return;
					}
					// Visit to next node
					t3 = t3.next;
				}
				// Visit to next node
				t2 = t2.next;
				t3 = l3.head;
			}
			// Visit to next node
			t1 = t1.next;
			t2 = l2.head;
		}
		Console.Write(" Triplet of sum " + k + " not found \n");
	}
	public static void Main(String[] args)
	{
		SingleLL sll1 = new SingleLL();
		SingleLL sll2 = new SingleLL();
		SingleLL sll3 = new SingleLL();
		// First linked list
		//  5 → 2 → -2 → 1 → 3 → 6 → NULL
		sll1.addNode(5);
		sll1.addNode(2);
		sll1.addNode(-2);
		sll1.addNode(1);
		sll1.addNode(3);
		sll1.addNode(6);
		// Second linked list
		//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
		sll2.addNode(-1);
		sll2.addNode(2);
		sll2.addNode(5);
		sll2.addNode(4);
		sll2.addNode(9);
		sll2.addNode(-9);
		// Third linked list
		//  1 → 2 → 8 → 4 → 3 → 6 → NULL
		sll3.addNode(1);
		sll3.addNode(2);
		sll3.addNode(8);
		sll3.addNode(4);
		sll3.addNode(3);
		sll3.addNode(6);
		int k = 22;
		// Test 
		sll1.tripletOfSumK(sll2, sll3, k);
	}
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
package main
import "fmt"
/*
    Go program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
type LinkNode struct {
	data int
	next * LinkNode
}
func getLinkNode(data int) * LinkNode {
	var me *LinkNode = &LinkNode {}
	me.data = data
	me.next = nil
	return me
}
type SingleLL struct {
	head * LinkNode
	tail * LinkNode
}
func getSingleLL() * SingleLL {
	var me *SingleLL = &SingleLL {}
	me.head = nil
	me.tail = nil
	return me
}
// Add new Node at end of linked list 
func(this *SingleLL) addNode(data int) {
	var node * LinkNode = getLinkNode(data)
	if this.head == nil {
		this.head = node
	} else {
		// Append the node at last position
		this.tail.next = node
	}
	this.tail = node
}
// Display linked list element
func(this SingleLL) display() {
	if this.head == nil {
		return
	}
	var temp * LinkNode = this.head
	// iterating linked list elements
	for (temp != nil) {
		fmt.Print(" ", temp.data, " →")
		// Visit to next node
		temp = temp.next
	}
	fmt.Print(" NULL\n")
}
func(this SingleLL) tripletOfSumK(l2 * SingleLL, 
	l3 * SingleLL, k int) {
	if this.head == nil || l2.head == nil || l3.head == nil {
		//  [Case Empty List]
		fmt.Print(" Given Sum triplet not exist\n")
		return
	}
	fmt.Print("\n Given Lists \n")
	this.display()
	l2.display()
	l3.display()
	fmt.Print(" Sum : ", k, " \n")
	var t1 * LinkNode = this.head
	var t2 * LinkNode = l2.head
	var t3 * LinkNode = l3.head
	// Compare linked list node
	for (t1 != nil) {
		for (t2 != nil) {
			for (t3 != nil) {
				if t1.data + t2.data + t3.data == k {
					fmt.Print(" Triplet : (", 
						t1.data, ",", 
						t2.data, ",", 
						t3.data, ")")
					return
				}
				// Visit to next node
				t3 = t3.next
			}
			// Visit to next node
			t2 = t2.next
			t3 = l3.head
		}
		// Visit to next node
		t1 = t1.next
		t2 = l2.head
	}
	fmt.Print(" Triplet of sum ", k, " not found \n")
}
func main() {
	var sll1 * SingleLL = getSingleLL()
	var sll2 * SingleLL = getSingleLL()
	var sll3 * SingleLL = getSingleLL()
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1.addNode(5)
	sll1.addNode(2)
	sll1.addNode(-2)
	sll1.addNode(1)
	sll1.addNode(3)
	sll1.addNode(6)
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2.addNode(-1)
	sll2.addNode(2)
	sll2.addNode(5)
	sll2.addNode(4)
	sll2.addNode(9)
	sll2.addNode(-9)
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3.addNode(1)
	sll3.addNode(2)
	sll3.addNode(8)
	sll3.addNode(4)
	sll3.addNode(3)
	sll3.addNode(6)
	var k int = 22
	// Test 
	sll1.tripletOfSumK(sll2, sll3, k)
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
<?php
/*
    Php program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode
{
	public $data;
	public $next;
	public	function __construct($data)
	{
		$this->data = $data;
		$this->next = NULL;
	}
}
class SingleLL
{
	public $head;
	public $tail;
	public	function __construct()
	{
		$this->head = NULL;
		$this->tail = NULL;
	}
	// Add new Node at end of linked list 
	public	function addNode($data)
	{
		$node = new LinkNode($data);
		if ($this->head == NULL)
		{
			$this->head = $node;
		}
		else
		{
			// Append the node at last position
			$this->tail->next = $node;
		}
		$this->tail = $node;
	}
	// Display linked list element
	public	function display()
	{
		if ($this->head == NULL)
		{
			return;
		}
		$temp = $this->head;
		// iterating linked list elements
		while ($temp != NULL)
		{
			echo(" ".$temp->data.
				" →");
			// Visit to next node
			$temp = $temp->next;
		}
		echo(" NULL\n");
	}
	public	function tripletOfSumK($l2, $l3, $k)
	{
		if ($this->head == NULL || 
            $l2->head == NULL || 
            $l3->head == NULL)
		{
			//  [Case Empty List]
			echo(" Given Sum triplet not exist\n");
			return;
		}
		echo("\n Given Lists \n");
		$this->display();
		$l2->display();
		$l3->display();
		echo(" Sum : ".$k.
			" \n");
		$t1 = $this->head;
		$t2 = $l2->head;
		$t3 = $l3->head;
		// Compare linked list node
		while ($t1 != NULL)
		{
			while ($t2 != NULL)
			{
				while ($t3 != NULL)
				{
					if ($t1->data + $t2->data + $t3->data == $k)
					{
						echo(" Triplet : (".$t1->data.
							",".$t2->data.
							",".$t3->data.
							")");
						return;
					}
					// Visit to next node
					$t3 = $t3->next;
				}
				// Visit to next node
				$t2 = $t2->next;
				$t3 = $l3->head;
			}
			// Visit to next node
			$t1 = $t1->next;
			$t2 = $l2->head;
		}
		echo(" Triplet of sum ".$k.
			" not found \n");
	}
}

function main()
{
	$sll1 = new SingleLL();
	$sll2 = new SingleLL();
	$sll3 = new SingleLL();
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	$sll1->addNode(5);
	$sll1->addNode(2);
	$sll1->addNode(-2);
	$sll1->addNode(1);
	$sll1->addNode(3);
	$sll1->addNode(6);
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	$sll2->addNode(-1);
	$sll2->addNode(2);
	$sll2->addNode(5);
	$sll2->addNode(4);
	$sll2->addNode(9);
	$sll2->addNode(-9);
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	$sll3->addNode(1);
	$sll3->addNode(2);
	$sll3->addNode(8);
	$sll3->addNode(4);
	$sll3->addNode(3);
	$sll3->addNode(6);
	$k = 22;
	// Test 
	$sll1->tripletOfSumK($sll2, $sll3, $k);
}
main();

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
/*
    Node JS program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode
{
	constructor(data)
	{
		this.data = data;
		this.next = null;
	}
}
class SingleLL
{
	constructor()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	addNode(data)
	{
		var node = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	display()
	{
		if (this.head == null)
		{
			return;
		}
		var temp = this.head;
		// iterating linked list elements
		while (temp != null)
		{
			process.stdout.write(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		process.stdout.write(" NULL\n");
	}
	tripletOfSumK(l2, l3, k)
	{
		if (this.head == null || l2.head == null || l3.head == null)
		{
			//  [Case Empty List]
			process.stdout.write(" Given Sum triplet not exist\n");
			return;
		}
		process.stdout.write("\n Given Lists \n");
		this.display();
		l2.display();
		l3.display();
		process.stdout.write(" Sum : " + k + " \n");
		var t1 = this.head;
		var t2 = l2.head;
		var t3 = l3.head;
		// Compare linked list node
		while (t1 != null)
		{
			while (t2 != null)
			{
				while (t3 != null)
				{
					if (t1.data + t2.data + t3.data == k)
					{
						process.stdout.write(" Triplet : (" + 
                                             t1.data + "," + 
                                             t2.data + "," + 
                                             t3.data + ")");
						return;
					}
					// Visit to next node
					t3 = t3.next;
				}
				// Visit to next node
				t2 = t2.next;
				t3 = l3.head;
			}
			// Visit to next node
			t1 = t1.next;
			t2 = l2.head;
		}
		process.stdout.write(" Triplet of sum " + k + " not found \n");
	}
}

function main()
{
	var sll1 = new SingleLL();
	var sll2 = new SingleLL();
	var sll3 = new SingleLL();
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1.addNode(5);
	sll1.addNode(2);
	sll1.addNode(-2);
	sll1.addNode(1);
	sll1.addNode(3);
	sll1.addNode(6);
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2.addNode(-1);
	sll2.addNode(2);
	sll2.addNode(5);
	sll2.addNode(4);
	sll2.addNode(9);
	sll2.addNode(-9);
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3.addNode(1);
	sll3.addNode(2);
	sll3.addNode(8);
	sll3.addNode(4);
	sll3.addNode(3);
	sll3.addNode(6);
	var k = 22;
	// Test 
	sll1.tripletOfSumK(sll2, sll3, k);
}
main();

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
#    Python 3 program for
#    Find a triplet from three linked lists with given sum

#  Linked list node
class LinkNode :
	def __init__(self, data) :
		self.data = data
		self.next = None
	

class SingleLL :
	def __init__(self) :
		self.head = None
		self.tail = None
	
	#  Add new Node at end of linked list 
	def addNode(self, data) :
		node = LinkNode(data)
		if (self.head == None) :
			self.head = node
		else :
			#  Append the node at last position
			self.tail.next = node
		
		self.tail = node
	
	#  Display linked list element
	def display(self) :
		if (self.head == None) :
			return
		
		temp = self.head
		#  iterating linked list elements
		while (temp != None) :
			print("", temp.data ,"→", end = "")
			#  Visit to next node
			temp = temp.next
		
		print(" NULL")
	
	def tripletOfSumK(self, l2, l3, k) :
		if (self.head == None or l2.head == None or l3.head == None) :
			#   [Case Empty List]
			print(" Given Sum triplet not exist")
			return
		
		print("\n Given Lists ")
		self.display()
		l2.display()
		l3.display()
		print(" Sum : ", k ," ")
		t1 = self.head
		t2 = l2.head
		t3 = l3.head
		#  Compare linked list node
		while (t1 != None) :
			while (t2 != None) :
				while (t3 != None) :
					if (t1.data + t2.data + t3.data == k) :
						print(" Triplet : (", t1.data ,",", 
                              t2.data ,",", 
                              t3.data ,")", 
                              end = "")
						return
					
					#  Visit to next node
					t3 = t3.next
				
				#  Visit to next node
				t2 = t2.next
				t3 = l3.head
			
			#  Visit to next node
			t1 = t1.next
			t2 = l2.head
		
		print(" Triplet of sum ", k ," not found ")
	

def main() :
	sll1 = SingleLL()
	sll2 = SingleLL()
	sll3 = SingleLL()
	#  First linked list
	#   5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1.addNode(5)
	sll1.addNode(2)
	sll1.addNode(-2)
	sll1.addNode(1)
	sll1.addNode(3)
	sll1.addNode(6)
	#  Second linked list
	#   -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2.addNode(-1)
	sll2.addNode(2)
	sll2.addNode(5)
	sll2.addNode(4)
	sll2.addNode(9)
	sll2.addNode(-9)
	#  Third linked list
	#   1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3.addNode(1)
	sll3.addNode(2)
	sll3.addNode(8)
	sll3.addNode(4)
	sll3.addNode(3)
	sll3.addNode(6)
	k = 22
	#  Test 
	sll1.tripletOfSumK(sll2, sll3, k)

if __name__ == "__main__": main()

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum :  22
 Triplet : ( 5 , 9 , 8 )
#    Ruby program for
#    Find a triplet from three linked lists with given sum

#  Linked list node
class LinkNode 
	# Define the accessor and reader of class LinkNode
	attr_reader :data, :next
	attr_accessor :data, :next
	def initialize(data) 
		self.data = data
		self.next = nil
	end

end

class SingleLL 
	# Define the accessor and reader of class SingleLL
	attr_reader :head, :tail
	attr_accessor :head, :tail
	def initialize() 
		self.head = nil
		self.tail = nil
	end

	#  Add new Node at end of linked list 
	def addNode(data) 
		node = LinkNode.new(data)
		if (self.head == nil) 
			self.head = node
		else
 
			#  Append the node at last position
			self.tail.next = node
		end

		self.tail = node
	end

	#  Display linked list element
	def display() 
		if (self.head == nil) 
			return
		end

		temp = self.head
		#  iterating linked list elements
		while (temp != nil) 
			print(" ", temp.data ," →")
			#  Visit to next node
			temp = temp.next
		end

		print(" NULL\n")
	end

	def tripletOfSumK(l2, l3, k) 
		if (self.head == nil || l2.head == nil || l3.head == nil) 
			#   [Case Empty List]
			print(" Given Sum triplet not exist\n")
			return
		end

		print("\n Given Lists \n")
		self.display()
		l2.display()
		l3.display()
		print(" Sum : ", k ," \n")
		t1 = self.head
		t2 = l2.head
		t3 = l3.head
		#  Compare linked list node
		while (t1 != nil) 
			while (t2 != nil) 
				while (t3 != nil) 
					if (t1.data + t2.data + t3.data == k) 
						print(" Triplet : (", 
                              t1.data ,",", 
                              t2.data ,",", 
                              t3.data ,")")
						return
					end

					#  Visit to next node
					t3 = t3.next
				end

				#  Visit to next node
				t2 = t2.next
				t3 = l3.head
			end

			#  Visit to next node
			t1 = t1.next
			t2 = l2.head
		end

		print(" Triplet of sum ", k ," not found \n")
	end

end

def main() 
	sll1 = SingleLL.new()
	sll2 = SingleLL.new()
	sll3 = SingleLL.new()
	#  First linked list
	#   5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1.addNode(5)
	sll1.addNode(2)
	sll1.addNode(-2)
	sll1.addNode(1)
	sll1.addNode(3)
	sll1.addNode(6)
	#  Second linked list
	#   -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2.addNode(-1)
	sll2.addNode(2)
	sll2.addNode(5)
	sll2.addNode(4)
	sll2.addNode(9)
	sll2.addNode(-9)
	#  Third linked list
	#   1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3.addNode(1)
	sll3.addNode(2)
	sll3.addNode(8)
	sll3.addNode(4)
	sll3.addNode(3)
	sll3.addNode(6)
	k = 22
	#  Test 
	sll1.tripletOfSumK(sll2, sll3, k)
end

main()

Output

 Given Lists 
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22 
 Triplet : (5,9,8)
/*
    Scala program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode(var data: Int,
	var next: LinkNode)
{
	def this(data: Int)
	{
		this(data,null);
	}
}
class SingleLL(var head: LinkNode,
	var tail: LinkNode)
{
	def this()
	{
		this(null,null);
	}
	// Add new Node at end of linked list 
	def addNode(data: Int): Unit = {
		var node: LinkNode = new LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	def display(): Unit = {
		if (this.head == null)
		{
			return;
		}
		var temp: LinkNode = this.head;
		// iterating linked list elements
		while (temp != null)
		{
			print(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		print(" NULL\n");
	}
	def tripletOfSumK(l2: SingleLL, l3: SingleLL, k: Int): Unit = {
		if (this.head == null || l2.head == null || l3.head == null)
		{
			//  [Case Empty List]
			print(" Given Sum triplet not exist\n");
			return;
		}
		print("\n Given Lists \n");
		this.display();
		l2.display();
		l3.display();
		print(" Sum : " + k + " \n");
		var t1: LinkNode = this.head;
		var t2: LinkNode = l2.head;
		var t3: LinkNode = l3.head;
		// Compare linked list node
		while (t1 != null)
		{
			while (t2 != null)
			{
				while (t3 != null)
				{
					if (t1.data + t2.data + t3.data == k)
					{
						print(" Triplet : (" + 
                              t1.data + "," + 
                              t2.data + "," + 
                              t3.data + ")");
						return;
					}
					// Visit to next node
					t3 = t3.next;
				}
				// Visit to next node
				t2 = t2.next;
				t3 = l3.head;
			}
			// Visit to next node
			t1 = t1.next;
			t2 = l2.head;
		}
		print(" Triplet of sum " + k + " not found \n");
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var sll1: SingleLL = new SingleLL();
		var sll2: SingleLL = new SingleLL();
		var sll3: SingleLL = new SingleLL();
		// First linked list
		//  5 → 2 → -2 → 1 → 3 → 6 → NULL
		sll1.addNode(5);
		sll1.addNode(2);
		sll1.addNode(-2);
		sll1.addNode(1);
		sll1.addNode(3);
		sll1.addNode(6);
		// Second linked list
		//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
		sll2.addNode(-1);
		sll2.addNode(2);
		sll2.addNode(5);
		sll2.addNode(4);
		sll2.addNode(9);
		sll2.addNode(-9);
		// Third linked list
		//  1 → 2 → 8 → 4 → 3 → 6 → NULL
		sll3.addNode(1);
		sll3.addNode(2);
		sll3.addNode(8);
		sll3.addNode(4);
		sll3.addNode(3);
		sll3.addNode(6);
		var k: Int = 22;
		// Test 
		sll1.tripletOfSumK(sll2, sll3, k);
	}
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)
/*
    Swift 4 program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode
{
	var data: Int;
	var next: LinkNode? ;
	init(_ data: Int)
	{
		self.data = data;
		self.next = nil;
	}
}
class SingleLL
{
	var head: LinkNode? ;
	var tail: LinkNode? ;
	init()
	{
		self.head = nil;
		self.tail = nil;
	}
	// Add new Node at end of linked list 
	func addNode(_ data: Int)
	{
		let node: LinkNode = LinkNode(data);
		if (self.head == nil)
		{
			self.head = node;
		}
		else
		{
			// Append the node at last position
			self.tail!.next = node;
		}
		self.tail = node;
	}
	// Display linked list element
	func display()
	{
		if (self.head == nil)
		{
			return;
		}
		var temp: LinkNode? = self.head;
		// iterating linked list elements
		while (temp  != nil)
		{
			print("", temp!.data ,"→", terminator: "");
			// Visit to next node
			temp = temp!.next;
		}
		print(" NULL");
	}
	func tripletOfSumK(_ l2: SingleLL? , _ l3 : SingleLL? , _ k : Int)
	{
		if (self.head == nil || l2!.head == nil || l3!.head == nil)
		{
			//  [Case Empty List]
			print(" Given Sum triplet not exist");
			return;
		}
		print("\n Given Lists ");
		self.display();
		l2!.display();
		l3!.display();
		print(" Sum : ", k ," ");
		var t1: LinkNode? = self.head;
		var t2: LinkNode? = l2!.head;
		var t3: LinkNode? = l3!.head;
		// Compare linked list node
		while (t1  != nil)
		{
			while (t2  != nil)
			{
				while (t3  != nil)
				{
					if (t1!.data + t2!.data + t3!.data == k)
					{
						print(" Triplet : (", 
                              t1!.data ,",", 
                              t2!.data ,",", 
                              t3!.data ,")", terminator: "");
						return;
					}
					// Visit to next node
					t3 = t3!.next;
				}
				// Visit to next node
				t2 = t2!.next;
				t3 = l3!.head;
			}
			// Visit to next node
			t1 = t1!.next;
			t2 = l2!.head;
		}
		print(" Triplet of sum ", k ," not found ");
	}
}
func main()
{
	let sll1: SingleLL = SingleLL();
	let sll2: SingleLL = SingleLL();
	let sll3: SingleLL = SingleLL();
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1.addNode(5);
	sll1.addNode(2);
	sll1.addNode(-2);
	sll1.addNode(1);
	sll1.addNode(3);
	sll1.addNode(6);
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2.addNode(-1);
	sll2.addNode(2);
	sll2.addNode(5);
	sll2.addNode(4);
	sll2.addNode(9);
	sll2.addNode(-9);
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3.addNode(1);
	sll3.addNode(2);
	sll3.addNode(8);
	sll3.addNode(4);
	sll3.addNode(3);
	sll3.addNode(6);
	let k: Int = 22;
	// Test 
	sll1.tripletOfSumK(sll2, sll3, k);
}
main();

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum :  22
 Triplet : ( 5 , 9 , 8 )
/*
    Kotlin program for
    Find a triplet from three linked lists with given sum
*/
// Linked list node
class LinkNode
{
	var data: Int;
	var next: LinkNode ? ;
	constructor(data: Int)
	{
		this.data = data;
		this.next = null;
	}
}
class SingleLL
{
	var head: LinkNode ? ;
	var tail: LinkNode ? ;
	constructor()
	{
		this.head = null;
		this.tail = null;
	}
	// Add new Node at end of linked list 
	fun addNode(data: Int): Unit
	{
		val node: LinkNode = LinkNode(data);
		if (this.head == null)
		{
			this.head = node;
		}
		else
		{
			// Append the node at last position
			this.tail?.next = node;
		}
		this.tail = node;
	}
	// Display linked list element
	fun display(): Unit
	{
		if (this.head == null)
		{
			return;
		}
		var temp: LinkNode ? = this.head;
		// iterating linked list elements
		while (temp != null)
		{
			print(" " + temp.data + " →");
			// Visit to next node
			temp = temp.next;
		}
		print(" NULL\n");
	}
	fun tripletOfSumK(l2: SingleLL, l3 : SingleLL, k : Int): Unit
	{
		if (this.head == null || l2.head == null || l3.head == null)
		{
			//  [Case Empty List]
			print(" Given Sum triplet not exist\n");
			return;
		}
		print("\n Given Lists \n");
		this.display();
		l2.display();
		l3.display();
		print(" Sum : " + k + " \n");
		var t1: LinkNode ? = this.head;
		var t2: LinkNode ? = l2.head;
		var t3: LinkNode ? = l3.head;
		// Compare linked list node
		while (t1 != null)
		{
			while (t2 != null)
			{
				while (t3 != null)
				{
					if (t1.data + t2.data + t3.data == k)
					{
						print(" Triplet : (" + 
                              t1.data + "," + t2.data + "," + 
                              t3.data + ")");
						return;
					}
					// Visit to next node
					t3 = t3.next;
				}
				// Visit to next node
				t2 = t2.next;
				t3 = l3.head;
			}
			// Visit to next node
			t1 = t1.next;
			t2 = l2.head;
		}
		print(" Triplet of sum " + k + " not found \n");
	}
}
fun main(args: Array < String > ): Unit
{
	val sll1: SingleLL = SingleLL();
	val sll2: SingleLL = SingleLL();
	val sll3: SingleLL = SingleLL();
	// First linked list
	//  5 → 2 → -2 → 1 → 3 → 6 → NULL
	sll1.addNode(5);
	sll1.addNode(2);
	sll1.addNode(-2);
	sll1.addNode(1);
	sll1.addNode(3);
	sll1.addNode(6);
	// Second linked list
	//  -1 → 2 → 5 → 4 → 9 → -9 → NULL
	sll2.addNode(-1);
	sll2.addNode(2);
	sll2.addNode(5);
	sll2.addNode(4);
	sll2.addNode(9);
	sll2.addNode(-9);
	// Third linked list
	//  1 → 2 → 8 → 4 → 3 → 6 → NULL
	sll3.addNode(1);
	sll3.addNode(2);
	sll3.addNode(8);
	sll3.addNode(4);
	sll3.addNode(3);
	sll3.addNode(6);
	val k: Int = 22;
	// Test 
	sll1.tripletOfSumK(sll2, sll3, k);
}

Output

 Given Lists
 5 → 2 → -2 → 1 → 3 → 6 → NULL
 -1 → 2 → 5 → 4 → 9 → -9 → NULL
 1 → 2 → 8 → 4 → 3 → 6 → NULL
 Sum : 22
 Triplet : (5,9,8)

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