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leetcode-cn/problem (English)/所有数对的异或和(English) [bitwise-xor-of-all-pairings].html
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<p>You are given two <strong>0-indexed</strong> arrays, <code>nums1</code> and <code>nums2</code>, consisting of non-negative integers. There exists another array, <code>nums3</code>, which contains the bitwise XOR of <strong>all pairings</strong> of integers between <code>nums1</code> and <code>nums2</code> (every integer in <code>nums1</code> is paired with every integer in <code>nums2</code> <strong>exactly once</strong>).</p>
<p>You are given two <strong>0-indexed</strong> arrays, <code>nums1</code> and <code>nums2</code>, consisting of non-negative integers. Let there be another array, <code>nums3</code>, which contains the bitwise XOR of <strong>all pairings</strong> of integers between <code>nums1</code> and <code>nums2</code> (every integer in <code>nums1</code> is paired with every integer in <code>nums2</code> <strong>exactly once</strong>).</p>
<p>Return<em> the <strong>bitwise XOR</strong> of all integers in </em><code>nums3</code>.</p>