I would like to know how to solve CodeChef — Chef and Graph Queries online. I've solved this problem using an offline method.
My solution using MO's Algorithm: https://www.codechef.com/viewsolution/18109768
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Codeforces Round 940 (Div. 2) and CodeCraft-23
36:27:01
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Codeforces Round 940 (Div. 2) and CodeCraft-23
36:27:01
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