SP7296 CNTTREE - Trees Again

Given a tree, you need to count how many subtrees with diameter

The first line contains the number of test cases T. T test cases follow. For each test case, the first line contains N and K. The following N - 1 lines contain two integers ai and bi, indicating an edge between nodes ai and bi in the tree. There is a blank line after each test case.

Output T lines, one corresponding to each test case, containing the required answer.