- Trending Categories
- Data Structure
- Networking
- RDBMS
- Operating System
- Java
- iOS
- HTML
- CSS
- Android
- Python
- C Programming
- C++
- C#
- MongoDB
- MySQL
- Javascript
- PHP

- Selected Reading
- UPSC IAS Exams Notes
- Developer's Best Practices
- Questions and Answers
- Effective Resume Writing
- HR Interview Questions
- Computer Glossary
- Who is Who

We are given with two linked lists and the task is to form the pairs using the integer elements of linked lists such that their sum is equal to a given value which is let’s say, k. A linked list is a sequence of data structures, which are connected together via links.

**Input**

vector v_1 = {5, 7, 8, 10, 11},. vector v_2 = {6, 4, 3, 2, 0} , int k = 11

**Output**

Count of pairs from two linked lists whose sum is equal to a given value k are: 4

**Explanation**

The pairs which can be formed using the given linked lists are: (5, 6) = 11(equals to k), (5, 4) = 9(not equals to k), (5, 3) = 8(not equals to k), (5, 2) = 7(not equals to k), (5, 0) = 5(not equals to k), (7, 6) = 13(not equals to k), (7, 4) = 11(equals to k), (7, 3) = 10(not equals to k), (7, 2) = 9(not equals to k), (7, 0) = 7(not equals to k), (8, 6) = 14(not equals to k), (8, 4) = 12(not equals to k), (8, 3) = 11(equals to k), (8, 2) = 10(not equals to k), (8, 0) = 8(not equals to k), (10, 6) = 16(not equals to k), (10, 4) = 14(not equals to k), (10, 3) = 13(not equals to k), (10, 2) = 12(not equals to k), (10, 0) = 10(not equals to k), (11, 6) = 17(not equals to k), (11, 4) = 15(not equals to k), (11, 3) = 14(not equals to k), (11, 2) = 13(not equals to k), (11, 0) = 11(not equals to k). So, clearly there are 3 pairs which are equal to the given sum.

**Input**

vector v_1 = {2, 3, 5, 6},. vector v_2 = {6, 4, 3} , int k = 6

**Output**

Count of pairs from two linked lists whose sum is equal to a given value k are: 2

**Explanation**

The pairs which can be formed using the given linked lists are: (2, 6) = 8(not equals to k), (2, 4) = 6(equals to k), (2, 3) = 5(not equals to k), (3, 6) = 9(not equals to k), (3, 4) = 7(not equals to k), (3, 3) = 6(equals to k), (5, 6) = 11(not equals to k), (5, 4) = 9(not equals to k), (5, 3) = 8(not equals to k), (6, 6) = 12(not equals to k), (6, 4) = 10(not equals to k), (6, 3) = 9(not equals to k),. So, clearly there are 2 pairs which are equal to the given sum.

Input the value of k and integer type values into two vectors such that we can pass the vectors to form a linked list

Create a function that will create a linked list using the vector passed as an argument to the function.

Traverse the loop till the size of a vector and create a pointer object of class

ListNode

Traverse the loop while ptr-> next not equals to NULL and set ptr to ptr->next

Inside the ptr->next set vector[i]

Return start

Create a function that will return the count of pairs matching with the given sum.

Take a temporary variable count and set it to 0

Create two pointer object i.e. *first_list for first linked list and *second_list for second linked list.

Start loop from start pointer of first list till the list is not empty

Inside the loop, start another loop from start pointer of second list till the list is not empty

Inside the loop, check IF (first_list->data + second_list->data) == k then increment the count by 1

Return the count

Print the result.

#include<bits/stdc++.h> using namespace std; class ListNode{ public: int data; ListNode *next; ListNode(int data){ this->data = data; next = NULL; } }; ListNode *CreateList(vector v){ ListNode *start = new ListNode(v[0]); for (int i = 1; i < v.size(); i++){ ListNode *ptr = start; while (ptr->next != NULL){ ptr = ptr->next; } ptr->next = new ListNode(v[i]); } return start; } int sum_pair(ListNode *start_1, ListNode *start_2, int k){ int count = 0; ListNode *first_list , *second_list; for (first_list = start_1; first_list != NULL; first_list = first_list->next){ for (second_list = start_2; second_list != NULL; second_list = second_list->next){ if ((first_list->data + second_list->data) == k){ count++; } } } return count; } int main(){ vector<int> v_1 = {5, 7, 8, 10, 11}; ListNode* start_1 = CreateList(v_1); vector v_2 = {6, 4, 3, 2, 0}; ListNode* start_2 = CreateList(v_2); int k = 11; cout<<"Count of pairs from two linked lists whose sum is equal to a given value k are: "<<sum_pair(start_1, start_2, k); }

If we run the above code it will generate the following output −

Count of pairs from two linked lists whose sum is equal to a given value k are: 4

- Related Questions & Answers
- Count pairs from two linked lists whose product is equal to a given value in C++
- Count pairs from two BSTs whose sum is equal to a given value x in C++
- Count pairs from two sorted arrays whose sum is equal to a given value x in C++
- Count pairs in a binary tree whose sum is equal to a given value x in C++
- Count triplets in a sorted doubly linked list whose sum is equal to a given value x in C++
- Count quadruples from four sorted arrays whose sum is equal to a given value x in C++
- Count pairs from two arrays having sum equal to K in C++
- Count triplets in a sorted doubly linked list whose product is equal to a given value x in C++
- Find a triplet from three linked lists with a sum equal to a given number in C++
- Maximum Primes whose sum is equal to given N in C++
- Count all triplets whose sum is equal to a perfect cube in C++
- How to find all pairs of elements in Java array whose sum is equal to a given number?
- Count pairs with given sum in C++
- Count pairs from two arrays whose modulo operation yields K in C++
- Count pairs in array whose sum is divisible by K in C++

Advertisements