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leetcode-cn/problem (English)/丢失的数字(English) [missing-number].html
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<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre>
<strong>Input:</strong> nums = [3,0,1]
<strong>Output:</strong> 2
<strong>Explanation:</strong> n = 3 since there are 3 numbers, so all numbers are in the range [0,3]. 2 is the missing number in the range since it does not appear in nums.
</pre>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">nums = [3,0,1]</span></p>
<p><strong>Output:</strong> <span class="example-io">2</span></p>
<p><strong>Explanation:</strong></p>
<p><code>n = 3</code> since there are 3 numbers, so all numbers are in the range <code>[0,3]</code>. 2 is the missing number in the range since it does not appear in <code>nums</code>.</p>
</div>
<p><strong class="example">Example 2:</strong></p>
<pre>
<strong>Input:</strong> nums = [0,1]
<strong>Output:</strong> 2
<strong>Explanation:</strong> n = 2 since there are 2 numbers, so all numbers are in the range [0,2]. 2 is the missing number in the range since it does not appear in nums.
</pre>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">nums = [0,1]</span></p>
<p><strong>Output:</strong> <span class="example-io">2</span></p>
<p><strong>Explanation:</strong></p>
<p><code>n = 2</code> since there are 2 numbers, so all numbers are in the range <code>[0,2]</code>. 2 is the missing number in the range since it does not appear in <code>nums</code>.</p>
</div>
<p><strong class="example">Example 3:</strong></p>
<pre>
<strong>Input:</strong> nums = [9,6,4,2,3,5,7,0,1]
<strong>Output:</strong> 8
<strong>Explanation:</strong> n = 9 since there are 9 numbers, so all numbers are in the range [0,9]. 8 is the missing number in the range since it does not appear in nums.
</pre>
<div class="example-block">
<p><strong>Input:</strong> <span class="example-io">nums = [9,6,4,2,3,5,7,0,1]</span></p>
<p><strong>Output:</strong> <span class="example-io">8</span></p>
<p><strong>Explanation:</strong></p>
<p><code>n = 9</code> since there are 9 numbers, so all numbers are in the range <code>[0,9]</code>. 8 is the missing number in the range since it does not appear in <code>nums</code>.</p>
</div>
<div class="simple-translate-system-theme" id="simple-translate">
<div>
<div class="simple-translate-button isShow" style="background-image: url(&quot;moz-extension://8a9ffb6b-7e69-4e93-aae1-436a1448eff6/icons/512.png&quot;); height: 22px; width: 22px; top: 318px; left: 36px;">&nbsp;</div>
<div class="simple-translate-panel " style="width: 300px; height: 200px; top: 0px; left: 0px; font-size: 13px;">
<div class="simple-translate-result-wrapper" style="overflow: hidden;">
<div class="simple-translate-move" draggable="true">&nbsp;</div>
<div class="simple-translate-result-contents">
<p class="simple-translate-result" dir="auto">&nbsp;</p>
<p class="simple-translate-candidate" dir="auto">&nbsp;</p>
</div>
</div>
</div>
</div>
</div>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>