You need to create new nodes while preserving the connection structure. The challenge: when you clone a node, you need to clone its neighbors. But a neighbor might point back to a node you've already cloned. Use a hash map from original node → cloned node. Before cloning, check if you've already cloned this node.
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$ curl repovive.com/roadmaps/maang-interview-prep/graphs/clone-graph-hint
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