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add leetcode problem-cn part5

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小墨
2022-03-27 20:52:13 +08:00
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算法题（国内版）/problem (Chinese)/字符串相加 [add-strings].html Normal file
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<p>给定两个字符串形式的非负整数&nbsp;<code>num1</code> 和<code>num2</code>&nbsp;，计算它们的和并同样以字符串形式返回。</p>
<p>你不能使用任何內建的用于处理大整数的库（比如 <code>BigInteger</code>），&nbsp;也不能直接将输入的字符串转换为整数形式。</p>
<p>&nbsp;</p>
<p><strong>示例 1：</strong></p>
<pre>
<strong>输入：</strong>num1 = "11", num2 = "123"
<strong>输出：</strong>"134"
</pre>
<p><strong>示例 2：</strong></p>
<pre>
<strong>输入：</strong>num1 = "456", num2 = "77"
<strong>输出：</strong>"533"
</pre>
<p><strong>示例 3：</strong></p>
<pre>
<strong>输入：</strong>num1 = "0", num2 = "0"
<strong>输出：</strong>"0"
</pre>
<p>&nbsp;</p>
<p>&nbsp;</p>
<p><strong>提示：</strong></p>
<ul>
<li><code>1 &lt;= num1.length, num2.length &lt;= 10<sup>4</sup></code></li>
<li><code>num1</code> 和<code>num2</code> 都只包含数字&nbsp;<code>0-9</code></li>
<li><code>num1</code> 和<code>num2</code> 都不包含任何前导零</li>
</ul>