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Yet Another Tree Problem
The following problem popped into my mind all of a sudden and I have no idea how to solve it.
You are given a weighted rooted tree with $$$n$$$ nodes. You need to find the number of unordered pairs of nodes $$$(u,v)$$$ such that
$$$Constraints: 1<=n<= 10^5, -10^6<=edge\,weights<=10^6$$$
It will be really helpful if you can provide me with a solution.
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en2 |
|
YouKn0wWho | 2019-07-14 10:08:52 | 7 | Tiny change: ' weighted tree w' -> ' weighted rooted tree w' | |
| en1 |
|
YouKn0wWho | 2019-07-13 12:49:37 | 477 | Initial revision (published) |
