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Hello Codeforces!
I need help on IZHO 2009 E-problem. How to solve it?
Short description :
Given number n and two arrays, W[1...n], S[1...n].(n <= 1e5). And q queries. For each query given number k(k<=1e9), you must find pos, what d(pos, k) is maximum. Where d(x, k) = W[x] + k * S[x].
P.S sorry for my English.
https://wcipeg.com/wiki/Convex_hull_trick
I understand what we will use this, but how?
Just add slopes like (S[x],W[x]). Then for every query you can find a answer with binary search or just sort the queries to use pointer technique.
Thank you