Question

Find Mex In Tree Problem Description You are given a tree having A nodes numbered from 0 to A-1. rooted at Node 0. Each node has a distinct value ranging between (0, A-1). ith node having value CH (No two nodes have same value) For each node in the tree, you have to find the smallest non-negative integer value which is not present in the subtree of that node. Problem Constraints 1​

Answer 1

Answer:

thdcsjdyejgdjshstxjsCDshxtCAdgrb

Explanation:

gsbxf jdhxhdjjsisysusvdtxusjbdcfjsxygsbdfshfsgshshdhfhDJfgfgfgfgfg

hbzhxvcvfvdhdhbdbdf

d

dddddddd

Answer 2

Answer:

For each node uu, consider the integers assigned to the nodes in the subtree of uu (including uu); let a_ua u denote the MEX of these integers. Chef wants a_1+a_2+…+a_Na 1+a 2 +…+a N to be as large as possible. Find the maximum possible value of this sum.

Explanation:

If you assign a node xx fee 00, then all of the nodes which aren't node xx or its ancestor can have MEXMEX fee a_i = 0a

i =0, and our solution could be decreased to sum of MEXMEX values of nodes mendacity at the easy route from the basis to node xx. So it offers us a touch that it's far most excellent to assign fee 00 to a node that's a leaf, Also the most MEXMEX fee i.e. a_ia

i of a node that it could have, is identical to the scale of its subtree and for a route from the basis to node xx it's far constantly feasible to assign the most MEXMEX fee to every node mendacity at the route. Now the trouble reduces to locating a route from the basis to a leaf such that the sum of the scale of the subtree of nodes is most and so as to be our solution. This may be executed effortlessly through computing the subtree of every node after which doing a dfsdfs which, for every node keeps a fee that's identical to the sum of the subtree of all its ancestor along with itself, and the most of these values could be our solution. (Note our solution may be large).

A tree which does not have any node other than root node is called a null tree

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A tree T consisting of n nodes An integer x Each node has some value w[i] associated with it....

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