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38 lines
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38 lines
1.7 KiB
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<p>给你一个整数数组 <code>nums</code> 和一个整数 <code>k</code> 。区间 <code>[left, right]</code>（<code>left <= right</code>）的 <strong>异或结果</strong> 是对下标位于 <code>left</code> 和 <code>right</code>（包括 <code>left</code> 和 <code>right</code> ）之间所有元素进行 <code>XOR</code> 运算的结果：<code>nums[left] XOR nums[left+1] XOR ... XOR nums[right]</code> 。</p>
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<p>返回数组中 <strong>要更改的最小元素数</strong> ，以使所有长度为 <code>k</code> 的区间异或结果等于零。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入：</strong>nums = [1,2,0,3,0], k = 1
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<strong>输出：</strong>3
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<strong>解释：</strong>将数组 [<strong>1</strong>,<strong>2</strong>,0,<strong>3</strong>,0] 修改为 [<strong>0</strong>,<strong>0</strong>,0,<strong>0</strong>,0]
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入：</strong>nums = [3,4,5,2,1,7,3,4,7], k = 3
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<strong>输出：</strong>3
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<strong>解释：</strong>将数组 [3,4,<strong>5</strong>,<strong>2</strong>,<strong>1</strong>,7,3,4,7] 修改为 [3,4,<strong>7</strong>,<strong>3</strong>,<strong>4</strong>,7,3,4,7]
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</pre>
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<p><strong>示例 3：</strong></p>
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<pre>
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<strong>输入：</strong>nums = [1,2,4,1,2,5,1,2,6], k = 3
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<strong>输出：</strong>3
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<strong>解释：</strong>将数组[1,2,<strong>4,</strong>1,2,<strong>5</strong>,1,2,<strong>6</strong>] 修改为 [1,2,<strong>3</strong>,1,2,<strong>3</strong>,1,2,<strong>3</strong>]</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= k <= nums.length <= 2000</code></li>
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<li><code>0 <= nums[i] < 2<sup>10</sup></code></li>
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</ul>
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