国外版

算法题（国外版）/number-of-rectangles-that-can-form-the-largest-square.html

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+<p>You are given an array <code>rectangles</code> where <code>rectangles[i] = [l<sub>i</sub>, w<sub>i</sub>]</code> represents the <code>i<sup>th</sup></code> rectangle of length <code>l<sub>i</sub></code> and width <code>w<sub>i</sub></code>.</p>
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+
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+<p>You can cut the <code>i<sup>th</sup></code> rectangle to form a square with a side length of <code>k</code> if both <code>k &lt;= l<sub>i</sub></code> and <code>k &lt;= w<sub>i</sub></code>. For example, if you have a rectangle <code>[4,6]</code>, you can cut it to get a square with a side length of at most <code>4</code>.</p>
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+
+
+<p>Let <code>maxLen</code> be the side length of the <strong>largest</strong> square you can obtain from any of the given rectangles.</p>
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+
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+<p>Return <em>the <strong>number</strong> of rectangles that can make a square with a side length of </em><code>maxLen</code>.</p>
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+
+
+<p>&nbsp;</p>
+
+<p><strong>Example 1:</strong></p>
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+
+
+<pre>
+
+<strong>Input:</strong> rectangles = [[5,8],[3,9],[5,12],[16,5]]
+
+<strong>Output:</strong> 3
+
+<strong>Explanation:</strong> The largest squares you can get from each rectangle are of lengths [5,3,5,5].
+
+The largest possible square is of length 5, and you can get it out of 3 rectangles.
+
+</pre>
+