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0560-subarray-sum-equals-k/README.md

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+<h2><a href="https://leetcode.com/problems/subarray-sum-equals-k">560. Subarray Sum Equals K</a></h2><h3>Medium</h3><hr><p>Given an array of integers <code>nums</code> and an integer <code>k</code>, return <em>the total number of subarrays whose sum equals to</em> <code>k</code>.</p>
+
+<p>A subarray is a contiguous <strong>non-empty</strong> sequence of elements within an array.</p>
+
+<p>&nbsp;</p>
+<p><strong class="example">Example 1:</strong></p>
+<pre><strong>Input:</strong> nums = [1,1,1], k = 2
+<strong>Output:</strong> 2
+</pre><p><strong class="example">Example 2:</strong></p>
+<pre><strong>Input:</strong> nums = [1,2,3], k = 3
+<strong>Output:</strong> 2
+</pre>
+<p>&nbsp;</p>
+<p><strong>Constraints:</strong></p>
+
+<ul>
+	<li><code>1 &lt;= nums.length &lt;= 2 * 10<sup>4</sup></code></li>
+	<li><code>-1000 &lt;= nums[i] &lt;= 1000</code></li>
+	<li><code>-10<sup>7</sup> &lt;= k &lt;= 10<sup>7</sup></code></li>
+</ul>