Leetcode 88: Merge Sorted Array
The original question can be found here. It’s asking us to merge array nums2 into array nums1. The most straightforward […]
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Leetcode 560: Subarray Sum Equals K
The orignal question can be found here. The question is asking the number of subarrays which the sum value equals
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Leetcode 53: Maximum Subarray
The original question can be found here. The question is aksing for the largest sum of the subarray. We can
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Leetcode 239: Sliding Window Maximum
The original question can be found here. The question is asking to find the maximum number inside each sliding window(subarray).
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Prefix Sum
Prefix sum is a very useful technique which can be used for some subarray questions. Let’s look at how it
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Leetcode 523: Continuous Subarray Sum
The original question can be found here. This question is quite tricky. I will say best of luck to you