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What will be the worst case time complexity of code to find sum in given query range (l,r) in an array of size n with q number of such queries when we apply MO’s algorithm?

What will be the worst case time complexity of code to find sum in given query range (l,r) in an array of size n with q number of such queries when we apply MO’s algorithm? Correct Answer O((q+n)√n)

Mo’s algorithm requires O(q*√n) + O(n*√n) time for processing all the queries. It is better than the naive solution where O(n*q) time is required.

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What will be the worst case time complexity of code to find sum in given query range (l,r) in an array of size n with q number of such queries?
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