Shikamaru has Queries SOLUTIONS ECAUG209

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Shikamaru has Queries SOLUTIONS

Given a tree with N hubs numbered 1 to N established at hub 1, where the ith hub has a worth Ai, answer Q inquiries of the folowing type. : 
 
a b w: For all hubs in the straightforward way among an and b, print the total of estimations of hubs where worth is <=w. 
 
Information: 
 
First line will contain N and Q 
 
Next N−1 lines contain u,v speaking to an edge between them. 
 
Next line contains N whole numbers A1,A2,…,AN. 
 
Every one of the accompanying Q lines contain an inquiry of type a b w. 
 
Yield: 
 
Answer each Query in another line. 
 
Limitations 
 
3≤N,Q≤105 
 
0≤Ai,W≤5∗105 
 
1≤u,v,a,b≤N 
 
u!=v 
 
Test Input: 
 
5 3 
 
1 2 
 
2 3 
 
1 4 
 
4 5 
 
1 2 3 4 5 
 
1 3 2 
 
3 5 3 
 
4 5 1 
 
Test Output: 
 
3 
 
6 
 
0
 

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