வேர்(A data structure containing zero or more nodes that are linked together in a hierarchy. If any nodes are present, one node is the root; each node except the root is the child of one and only one other node, and each node has zero or more nodes as children); மரம்(A data structure containing zero or more nodes that are linked together in a hierarchy. If any nodes are present, one node is the root; each node except the root is the child of one and only one other node, and each node has zero or more nodes as children)
