Bitwise XOR of All Pairings | Approache| Dry Runs | Leetcode 2425 | CodeWithShaaz

Java Program to Find XOR of All Pairs Between Two Arrays 🚀
This Java program calculates the XOR of all possible pairs formed by elements from two arrays, nums1 and nums2.

🔍 How It Works:

Count Occurrences with Impact:

Each number in nums1 is counted n times (where n is the size of nums2) because it will pair with each element in nums2.
Similarly, each number in nums2 is counted m times (where m is the size of nums1).
Build Frequency Map:

A HashMap is used to store how many times each number appears across all pairs.
Apply XOR Logic:

If a number appears an odd number of times, it will contribute to the final XOR result.
If a number appears an even number of times, its effect cancels out.
Return the Result:

XOR all numbers with odd frequencies to get the final answer.

✨ Key Concepts Used:

HashMap for frequency counting.
Bitwise XOR (^) properties.
Modulo Operation (%) to check for odd frequencies.
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