Copied to Clipboard
Swapping pairs make sum equal
Easy Accuracy: 41.35% Submissions: 14142 Points: 2

Given two arrays of integers A[] and B[] of size N and M, the task is to check if a pair of values (one value from each array) exists such that swapping the elements of the pair will make the sum of two arrays equal.


Example 1:

Input: N = 6, M = 4
A[] = {4, 1, 2, 1, 1, 2}
B[] = (3, 6, 3, 3)
Output: 1
Explanation: Sum of elements in A[] = 11
Sum of elements in B[] = 15, To get same 
sum from both arrays, we can swap following 
values: 1 from A[] and 3 from B[]

Example 2:

Input: N = 4, M = 4
A[] = {5, 7, 4, 6}
B[] = {1, 2, 3, 8}
Output: 1
Explanation: We can swap 6 from array 
A[] and 2 from array B[]

Your Task:
This is a function problem. You don't need to take any input, as it is already accomplished by the driver code. You just need to complete the function findSwapValues() that takes array A, array B, integer N, and integeras parameters and returns 1 if there exists any such pair otherwise returns -1.


Expected Time Complexity: O(MlogM+NlogN).
Expected Auxiliary Space: O(1).


1 ≤ N, M ≤ 106

We are replacing the old Disqus forum with the new Discussions section given below.
Click here to view old Disqus comments.

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.

Swapping pairs make sum equal

Output Window