Geeksforgeeks

Error

×

Given two unsorted arrays **A** of size **N** and **B** of size **M** of distinct elements, the task is to find all pairs from both arrays whose sum is equal to **X**.

**Example 1:**

**Input:**
A[] = {1, 2, 4, 5, 7}
B[] = {5, 6, 3, 4, 8}
X = 9
**Output:
**1 8
4 5
5 4
**Explanation:**
(1, 8), (4, 5), (5, 4) are the
pairs which sum to 9.

**Input:**
A[] = {-1, -2, 4, -6, 5, 7}
B[] = {6, 3, 4, 0}
X = 8
**Output:**
4 4
5 3

**Your Task: **

You don't need to read input or print anything. Your task is to complete the function **allPairs()** which takes the array **A[]**,** B[]**, its size **N **and **M **respectively** **and** **an integer **X **as inputs and returns the sorted vector pair values of all the pairs u,v where u belongs to array A and v belongs to array B. If no such pair exist return empty vector pair.

**Expected Time Complexity:** O(NLog(N))

**Expected Auxiliary Space:** O(N)

**Constraints:**

1 ≤ N, M ≤ 10^{6}

-10^{6} ≤ X, A[i], B[i] ≤ 10^{6}

We are replacing the old Disqus forum with the new Discussions section given below.

Click here to view old Disqus comments.

Click here to view old Disqus comments.

Login 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?

YesLoading...

Find all pairs with a given sum

...