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I am trying to solve this problem on Hackerrank.
https://www.hackerrank.com/challenges/the-strange-function/problem
I am not able to understand how to quickly find: (sum of subarray) — (maximum of subarray)
Please anyone explain how to solve this. Thanks in advance
For find out the sum of a subarray you can use cumulative sum technique. Sum of subarray [l, r] is cumulativesum[r] — cumulativesum[l-1].
Maximum of a subarray can be easily found by segment tree data structure.