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<p>给定一个正整数 <code>n</code> ,返回范围在 <code>[0, n]</code> 都非负整数中,其二进制表示不包含 <strong>连续的 1 </strong>的个数。</p>
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<p> </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 = 5
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<strong>输出:</strong> 5
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<strong>解释:</strong> 
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下面是带有相应二进制表示的非负整数<= 5:
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0 : 0
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1 : 1
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2 : 10
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3 : 11
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4 : 100
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5 : 101
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其中,只有整数3违反规则(有两个连续的1),其他5个满足规则。</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 = 1
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<strong>输出:</strong> 2
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</pre>
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<p><strong>示例 3:</strong></p>
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<pre>
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<strong>输入:</strong> n = 2
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<strong>输出:</strong> 3
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</pre>
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<p> </p>
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<p><strong>提示:</strong></p>
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<ul>
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	<li><code>1 <= n <= 10<sup>9</sup></code></li>
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</ul>
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