mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
synced 2025-02-04 14:40:27 +08:00
40 lines
1.1 KiB
HTML
40 lines
1.1 KiB
HTML
|
<p>给你一个长度为 <code>n</code> 的 <strong>整数</strong> 数组 <code>pref</code> 。找出并返回满足下述条件且长度为 <code>n</code> 的数组<em> </em><code>arr</code> ：</p>
|
|||
|
|
|
|||
|
|
<ul>
|
|||
|
|
<li><code>pref[i] = arr[0] ^ arr[1] ^ ... ^ arr[i]</code>.</li>
|
|||
|
|
</ul>
|
|||
|
|
|
|||
|
|
<p>注意 <code>^</code> 表示 <strong>按位异或</strong>（bitwise-xor）运算。</p>
|
|||
|
|
|
|||
|
|
<p>可以证明答案是 <strong>唯一</strong> 的。</p>
|
|||
|
|
|
|||
|
|
<p> </p>
|
|||
|
|
|
|||
|
|
<p><strong>示例 1：</strong></p>
|
|||
|
|
|
|||
|
|
<pre><strong>输入：</strong>pref = [5,2,0,3,1]
|
|||
|
|
<strong>输出：</strong>[5,7,2,3,2]
|
|||
|
|
<strong>解释：</strong>从数组 [5,7,2,3,2] 可以得到如下结果：
|
|||
|
|
- pref[0] = 5
|
|||
|
|
- pref[1] = 5 ^ 7 = 2
|
|||
|
|
- pref[2] = 5 ^ 7 ^ 2 = 0
|
|||
|
|
- pref[3] = 5 ^ 7 ^ 2 ^ 3 = 3
|
|||
|
|
- pref[4] = 5 ^ 7 ^ 2 ^ 3 ^ 2 = 1
|
|||
|
|
</pre>
|
|||
|
|
|
|||
|
|
<p><strong>示例 2：</strong></p>
|
|||
|
|
|
|||
|
|
<pre><strong>输入：</strong>pref = [13]
|
|||
|
|
<strong>输出：</strong>[13]
|
|||
|
|
<strong>解释：</strong>pref[0] = arr[0] = 13
|
|||
|
|
</pre>
|
|||
|
|
|
|||
|
|
<p> </p>
|
|||
|
|
|
|||
|
|
<p><strong>提示：</strong></p>
|
|||
|
|
|
|||
|
|
<ul>
|
|||
|
|
<li><code>1 <= pref.length <= 10<sup>5</sup></code></li>
|
|||
|
|
<li><code>0 <= pref[i] <= 10<sup>6</sup></code></li>
|
|||
|
|
</ul>
|