Hi, I've just solved a problem by using a technique called "Dijkstra on Segment Tree", I rly want to practice more, can someone recommend some problems using this trick? Thanks!
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Well Dijkstra on a tree is just BFS :) Be more specific with what that means and maybe you'll get an answer.
sorry, but i don't know how to describe the idea, hmm i mean that is the trick which was used in this problem: https://codeforces.net/problemset/problem/787/D