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44 lines
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44 lines
1.0 KiB
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<p>给你一个正整数 <code>n</code> 。<code>n</code> 中的每一位数字都会按下述规则分配一个符号：</p>
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<ul>
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<li><strong>最高有效位</strong> 上的数字分配到 <strong>正</strong> 号。</li>
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<li>剩余每位上数字的符号都与其相邻数字相反。</li>
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</ul>
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<p>返回所有数字及其对应符号的和。</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 = 521
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<strong>输出：</strong>4
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<strong>解释：</strong>(+5) + (-2) + (+1) = 4</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 = 111
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<strong>输出：</strong>1
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<strong>解释：</strong>(+1) + (-1) + (+1) = 1
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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 = 886996
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<strong>输出：</strong>0
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<strong>解释：</strong>(+8) + (-8) + (+6) + (-9) + (+9) + (-6) = 0
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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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<p> </p>
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