1ms clean JAVA solution

  • 0
    public class Solution {
        public List<Integer> inorderTraversal(TreeNode root) {
            List<Integer> res = new LinkedList<Integer>();
            sol(root, res);
            return res;
        public void sol(TreeNode cur, List<Integer> res) {
            if(cur == null) return;
            sol(cur.left, res);
            sol(cur.right, res);

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