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add leetcode problem-cn part6

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<p>给定一个含有 <code>n</code><strong> </strong>个正整数的数组和一个正整数 <code>target</code><strong></strong></p>
<p>找出该数组中满足其和<strong> </strong><code>≥ target</code><strong> </strong>的长度最小的 <strong>连续子数组</strong> <code>[nums<sub>l</sub>, nums<sub>l+1</sub>, ..., nums<sub>r-1</sub>, nums<sub>r</sub>]</code> ,并返回其长度<strong></strong>如果不存在符合条件的子数组,返回 <code>0</code></p>
<p> </p>
<p><strong>示例 1</strong></p>
<pre>
<strong>输入:</strong>target = 7, nums = [2,3,1,2,4,3]
<strong>输出:</strong>2
<strong>解释:</strong>子数组 <code>[4,3]</code> 是该条件下的长度最小的子数组。
</pre>
<p><strong>示例 2</strong></p>
<pre>
<strong>输入:</strong>target = 4, nums = [1,4,4]
<strong>输出:</strong>1
</pre>
<p><strong>示例 3</strong></p>
<pre>
<strong>输入:</strong>target = 11, nums = [1,1,1,1,1,1,1,1]
<strong>输出:</strong>0
</pre>
<p> </p>
<p><strong>提示:</strong></p>
<ul>
<li><code>1 <= target <= 10<sup>9</sup></code></li>
<li><code>1 <= nums.length <= 10<sup>5</sup></code></li>
<li><code>1 <= nums[i] <= 10<sup>5</sup></code></li>
</ul>
<p> </p>
<p><strong>进阶:</strong></p>
<ul>
<li>如果你已经实现<em> </em><code>O(n)</code> 时间复杂度的解法, 请尝试设计一个 <code>O(n log(n))</code> 时间复杂度的解法。</li>
</ul>