[LeetCode Sync] Runtime - 4 ms (61.09%), Memory - 17.9 MB (40.45%)

Author: NinePiece2

Solutions/0201-bitwise-and-of-numbers-range/README.md

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+<p>Given two integers <code>left</code> and <code>right</code> that represent the range <code>[left, right]</code>, return <em>the bitwise AND of all numbers in this range, inclusive</em>.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> left = 5, right = 7
+<strong>Output:</strong> 4
+</pre>
+
+<p><strong class="example">Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> left = 0, right = 0
+<strong>Output:</strong> 0
+</pre>
+
+<p><strong class="example">Example 3:</strong></p>
+
+<pre>
+<strong>Input:</strong> left = 1, right = 2147483647
+<strong>Output:</strong> 0
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>0 &lt;= left &lt;= right &lt;= 2<sup>31</sup> - 1</code></li>
+</ul>

Solutions/0201-bitwise-and-of-numbers-range/solution.py

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+class Solution:
+    def rangeBitwiseAnd(self, left: int, right: int) -> int:
+        while left < right:
+            right &= right - 1
+        return right