国外版

算法题（国外版）/sum-of-square-numbers.html

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+<p>Given a non-negative integer <code>c</code>, decide whether there&#39;re two integers <code>a</code> and <code>b</code> such that <code>a<sup>2</sup> + b<sup>2</sup> = c</code>.</p>
+
+<p>&nbsp;</p>
+<p><strong>Example 1:</strong></p>
+
+<pre>
+<strong>Input:</strong> c = 5
+<strong>Output:</strong> true
+<strong>Explanation:</strong> 1 * 1 + 2 * 2 = 5
+</pre>
+
+<p><strong>Example 2:</strong></p>
+
+<pre>
+<strong>Input:</strong> c = 3
+<strong>Output:</strong> false
+</pre>
+
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>0 &lt;= c &lt;= 2<sup>31</sup> - 1</code></li>
+</ul>