JAVA_N-ary Tree Postorder Traversal_LeetCode 590

JAVA_N-ary Tree Postorder Traversal_LeetCode 590 풀이 class Solution { List arr = new ArrayList(); public List postorder(Node root) { if(root == null) return arr; for(Node n: root.children) postorder(n); arr.add(root.val); return arr; } } * 출처 N-ary Tree Postorder Traversal - LeetCode N-ary Tree Postorder Traversal - Given the root of an n-ary tree, return the postorder traversal of its nodes' values. Nary-Tree input serialization is represented in their level order traversal.

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