Handle Score
@Ibrahim Nash 6454
@blackshadows 6380
@mb1973 5714
@Quandray 5245
@akhayrutdinov 5111
@saiujwal13083 5046
@sanjay05 3762
@kirtidee18 3709
@mantu_singh 3556
@marius_valentin_dragoi 3523
@sushant_a 3459
Complete Leaderboard
Count Pairs whose sum is equal to X
Easy Accuracy: 56.35% Submissions: 38685 Points: 2

Given two linked list of size N1 and N2 respectively of distinct elements, your task is to complete the function countPairs(), which returns the count of all pairs from both lists whose sum is equal to the given value X.
Note: The 2 numbers of a pair should be parts of different lists.

Example 1:

L1 = 1->2->3->4->5->6
L2 = 11->12->13
X = 15
Output: 3
Explanation: There are 3 pairs that
add up to 15 : (4,11) , (3,12) and (2,13)

Example 2:

L1 = 7->5->1->3
L2 = 3->5->2->8
X = 10
Output: 2
Explanation: There are 2 pairs that add up
to 10 : (7,3) and (5,5)

Your Task:
You only need to implement the given function countPairs() and return the count.

Expected Time Complexity: O(N+M)
Expected Auxiliary Space: O(N+M)

1<=size of linked list<=10000

Note : All elements in a linked list are unique.

to report an issue on this page.


We strongly recommend solving this problem on your own before viewing its editorial. Do you still want to view the editorial?


All Submissions

My Submissions:

Login to access your submissions.

Count Pairs whose sum is equal to X

Output Window