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0_0_39824535_13597\Main.java:21: 错误: 找不到符号
        LinkedList<BiTree> queue = new LinkedList<BiTree>();
        ^
  符号:   类 LinkedList
  位置: 类 Main
0_0_39824535_13597\Main.java:21: 错误: 找不到符号
        LinkedList<BiTree> queue = new LinkedList<BiTree>();
                                       ^
  符号:   类 LinkedList
  位置: 类 Main
2 个错误

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