Created
October 20, 2020 11:49
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# Definition for a Node. | |
# class Node | |
# attr_accessor :val, :neighbors | |
# def initialize(val = 0, neighbors = nil) | |
# @val = val | |
# neighbors = [] if neighbors.nil? | |
# @neighbors = neighbors | |
# end | |
# end | |
# @param {Node} node | |
# @return {Node} | |
def cloneGraph(node) | |
_cloneGraph(node, {}) | |
end | |
def _cloneGraph(node, memo) | |
return nil if node.nil? | |
return memo[node.val] if memo.include? node.val | |
new_node = memo[node.val] = Node.new node.val | |
new_node.neighbors = node.neighbors.map { |n| _cloneGraph(n, memo) } | |
new_node | |
end |
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