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‎solution/0000-0099/0017.Letter Combinations of a Phone Number/README.md

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<p>给出数字到字母的映射如下（与电话按键相同）。注意 1 不对应任何字母。</p>
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<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/images/200px-telephone-keypad2svg.png" style="width: 200px;" /></p>
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<p><img src="https://fastly.jsdelivr.net/gh/doocs/leetcode@main/solution/0000-0099/0017.Letter%20Combinations%20of%20a%20Phone%20Number/images/1752723054-mfIHZs-image.png" style="width: 200px;" /></p>
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<p>&nbsp;</p>
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‎solution/0000-0099/0017.Letter Combinations of a Phone Number/images/1200px-telephone-keypad2svg.png

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‎solution/0000-0099/0020.Valid Parentheses/README.md

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<p><span class="example-io"><b>输出：</b>true</span></p>
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</div>
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<p><strong class="example">示例 5：</strong></p>
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<div class="example-block">
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<p><span class="example-io"><b>输入：</b>s = "([)]"</span></p>
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<p><span class="example-io"><b>输出：</b>false</span></p>
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</div>
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<p>&nbsp;</p>
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<p><strong>提示：</strong></p>

‎solution/0000-0099/0020.Valid Parentheses/README_EN.md

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<p><strong>Output:</strong> <span class="example-io">true</span></p>
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</div>
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<p><strong class="example">Example 5:</strong></p>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">s = &quot;([)]&quot;</span></p>
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<p><strong>Output:</strong> <span class="example-io">false</span></p>
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</div>
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<p>&nbsp;</p>
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<p><strong>Constraints:</strong></p>
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‎solution/0100-0199/0190.Reverse Bits/README.md

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<p>&nbsp;</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>n = 00000010100101000001111010011100
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<strong>输出：</strong>964176192 (00111001011110000010100101000000)
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<strong>解释：</strong>输入的二进制串 <strong>00000010100101000001111010011100 </strong>表示无符号整数<strong> 43261596</strong><strong>，
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</strong> 因此返回 964176192，其二进制表示形式为 <strong>00111001011110000010100101000000</strong>。</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>n = 11111111111111111111111111111101
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<strong>输出：</strong>3221225471 (10111111111111111111111111111111)
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<strong>解释：</strong>输入的二进制串 <strong>11111111111111111111111111111101</strong> 表示无符号整数 4294967293，
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&nbsp; 因此返回 3221225471 其二进制表示形式为 <strong>10111111111111111111111111111111 。</strong></pre>
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<p><strong class="example">示例 1：</strong></p>
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<div class="example-block">
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<p><span class="example-io"><b>输入：</b>n = 43261596</span></p>
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<p><span class="example-io"><b>输出：</b>964176192</span></p>
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<p><strong>解释：</strong></p>
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<table>
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<tbody>
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<tr>
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<th>整数</th>
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<th>二进制</th>
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</tr>
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<tr>
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<td>43261596</td>
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<td>00000010100101000001111010011100</td>
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</tr>
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<tr>
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<td>964176192</td>
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<td>00111001011110000010100101000000</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p><strong class="example">示例 2：</strong></p>
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<div class="example-block">
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<p><span class="example-io"><b>输入：</b>n = 2147483644</span></p>
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<p><span class="example-io"><b>输出：</b>1073741822</span></p>
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<p><strong>解释：</strong></p>
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<table>
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<tbody>
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<tr>
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<th>整数</th>
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<th>二进制</th>
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</tr>
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<tr>
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<td>2147483644</td>
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<td>01111111111111111111111111111100</td>
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</tr>
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<tr>
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<td>1073741822</td>
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<td>00111111111111111111111111111110</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>&nbsp;</p>
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<p><strong>提示：</strong></p>
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<ul>
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<li>输入是一个长度为 <code>32</code> 的二进制字符串</li>
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<li><code>0 &lt;= n &lt;= 2<sup>31</sup>&nbsp;- 2</code></li>
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<li><code>n</code>&nbsp;为偶数</li>
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</ul>
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<p>&nbsp;</p>

‎solution/0100-0199/0190.Reverse Bits/README_EN.md

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<ul>
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<li>Note that in some languages, such as Java, there is no unsigned integer type. In this case, both input and output will be given as a signed integer type. They should not affect your implementation, as the integer&#39;s internal binary representation is the same, whether it is signed or unsigned.</li>
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<li>In Java, the compiler represents the signed integers using <a href="https://en.wikipedia.org/wiki/Two%27s_complement" target="_blank">2&#39;s complement notation</a>. Therefore, in <strong class="example">Example 2</strong> above, the input represents the signed integer <code>-3</code> and the output represents the signed integer <code>-1073741825</code>.</li>
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<li>In Java, the compiler represents the signed integers using <a href="https://en.wikipedia.org/wiki/Two%27s_complement" target="_blank">2&#39;s complement notation</a>. Therefore, in <strong class="example">Example 2</strong>&nbsp;below, the input represents the signed integer <code>-3</code> and the output represents the signed integer <code>-1073741825</code>.</li>
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</ul>
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<p>&nbsp;</p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> n = 00000010100101000001111010011100
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<strong>Output:</strong> 964176192 (00111001011110000010100101000000)
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<strong>Explanation: </strong>The input binary string <strong>00000010100101000001111010011100</strong> represents the unsigned integer 43261596, so return 964176192 which its binary representation is <strong>00111001011110000010100101000000</strong>.
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</pre>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">n = 43261596</span></p>
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<p><strong>Output:</strong> <span class="example-io">964176192</span></p>
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<p><strong>Explanation:</strong></p>
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<table>
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<tbody>
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<tr>
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<th>Integer</th>
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<th>Binary</th>
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</tr>
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<tr>
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<td>43261596</td>
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<td>00000010100101000001111010011100</td>
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</tr>
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<tr>
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<td>964176192</td>
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<td>00111001011110000010100101000000</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> n = 11111111111111111111111111111101
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<strong>Output:</strong> 3221225471 (10111111111111111111111111111111)
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<strong>Explanation: </strong>The input binary string <strong>11111111111111111111111111111101</strong> represents the unsigned integer 4294967293, so return 3221225471 which its binary representation is <strong>10111111111111111111111111111111</strong>.
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</pre>
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<div class="example-block">
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<p><strong>Input:</strong> <span class="example-io">n = 2147483644</span></p>
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<p><strong>Output:</strong> <span class="example-io">1073741822</span></p>
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<p><strong>Explanation:</strong></p>
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<table>
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<tbody>
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<tr>
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<th>Integer</th>
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<th>Binary</th>
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</tr>
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<tr>
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<td>2147483644</td>
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<td>01111111111111111111111111111100</td>
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</tr>
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<tr>
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<td>1073741822</td>
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<td>00111111111111111111111111111110</td>
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</tr>
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</tbody>
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</table>
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</div>
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<p>&nbsp;</p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li>The input must be a <strong>binary string</strong> of length <code>32</code></li>
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<li><code>0 &lt;= n &lt;= 2<sup>31</sup> - 2</code></li>
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<li><code>n</code> is even.</li>
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<p>&nbsp;</p>

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