Build the Tree
Problem description. Given a rooted tree with N nodes. Nodes of the tree are numbered from 1 to N. Node 1 is the root. You need to add M nodes to it in the given order. All the nodes have values. Cost for adding a node A with value va to another node B with value vb is va*vb. There is an additional cost of y (so total cost of va*vb+y) if B has atleast x child nodes. After node A has been added to
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solution.cppC++17
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