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Java Solution for LeetCode algorithm problems, continually updating
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560\. Subarray Sum Equals K
Medium
Given an array of integers `nums` and an integer `k`, return _the total number of continuous subarrays whose sum equals to `k`_.
**Example 1:**
**Input:** nums = [1,1,1], k = 2
**Output:** 2
**Example 2:**
**Input:** nums = [1,2,3], k = 3
**Output:** 2
**Constraints:**
* 1 <= nums.length <= 2 * 104
* `-1000 <= nums[i] <= 1000`
* -107 <= k <= 107