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A hard tree problem, hope someone can help me, Thanks
I just encountered a difficult problem with no solution. Can someone help me, thanks in advance.
Given a tree with N vertices. There are Q queries, the ith query is represented by K pairs (v, r), all vertices whose distance from v is not more than r will be marked. Ask how many vertices are marked per query. Limit N <= 5e4, Q <= 5e5 + N, the total K of all queries does not exceed 5e5 + N.
| Rev. | Lang. | By | When | Δ | Comment | |
|---|---|---|---|---|---|---|
| en2 |
|
sadboi2009 | 2024-05-10 19:09:15 | 20 | ||
| en1 |
|
sadboi2009 | 2024-05-10 19:07:46 | 464 | Initial revision (published) |
