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There are n cities numbered from 1 to n. You are given an array edges of size n-1, where edges[i] = [ui, vi] represents a bidirectional edge between cities ui and vi. There exists a unique path between each pair of cities. In other words, the cities form a tree.
A subtree is a subset of cities where every city is reachable from every other city in the subset, where the path between each pair passes through only the cities from the subset. Two subtrees are different if there is a city in one subtree that is not present in the other.
\r\n\r\nFor each d from 1 to n-1, find the number of subtrees in which the maximum distance between any two cities in the subtree is equal to d.
Return an array of size n-1 where the dth element (1-indexed) is the number of subtrees in which the maximum distance between any two cities is equal to d.
Notice that the distance between the two cities is the number of edges in the path between them.
\r\n\r\n\r\n
Example 1:
\r\n\r\n
\r\nInput: n = 4, edges = [[1,2],[2,3],[2,4]]\r\nOutput: [3,4,0]\r\nExplanation:\r\nThe subtrees with subsets {1,2}, {2,3} and {2,4} have a max distance of 1.\r\nThe subtrees with subsets {1,2,3}, {1,2,4}, {2,3,4} and {1,2,3,4} have a max distance of 2.\r\nNo subtree has two nodes where the max distance between them is 3.\r\n\r\n\r\nExample 2:
\r\n\r\n\r\nInput: n = 2, edges = [[1,2]]\r\nOutput: [1]\r\n\r\n\r\n
Example 3:
\r\n\r\n\r\nInput: n = 3, edges = [[1,2],[2,3]]\r\nOutput: [2,1]\r\n\r\n\r\n
\r\n
Constraints:
\r\n\r\n2 <= n <= 15edges.length == n-1edges[i].length == 21 <= ui, vi <= n(ui, vi) are distinct.Compiled with clang 11 using the latest C++ 20 standard.
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Most standard library headers are already included automatically for your convenience.
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