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Subarray Sum Equals K (LeetCode Day 22 Question) | Programming Tutorials

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Number of subarrays having sum exactly equal to k.
Given an array of integers and an integer k. We have to write a code to find the total number of continuous subarrays whose sum equals to k.
For example:
Example 1:
Input : {1, 1, 1} , k = 2
Output : 2
Example 2:
Input: {-1, -1, 1} , k = 0
Output: 1
Example 3:
Input : {1}, k = 0
Output: 0
Example 4:
Input: {10, 2, -2, -30, 10} , k = -20
Output : 3
This problem is the day 22 challenge of LeetCode 30 day challenge.
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