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7-1 哈利·波特的考试 (25分)哈利·波特要考试了，他需要你的帮助。这门课学的是用魔咒将一种动物变成另一种动物的本事。例如将猫变成老鼠的魔咒是haha，将老鼠变成鱼的魔咒是hehe等等。反方向变化的魔咒就是简单地将原来的魔咒倒过来念，例如ahah可以将老鼠变成猫。另外，如果想把猫变成鱼，可以通过...

用Java写数据结构作业——7-2 六度空间 (30分)

7-2 六度空间 (30分)“六度空间”理论又称作“六度分隔（Six Degrees of Separation）”理论。这个理论可以通俗地阐述为：“你和任何一个陌生人之间所间隔的人不会超过六个，也就是说，最多通过五个人你就能够认识任何一个陌生人。”如图1所示。图1 六度空间示意图“六度空间”理论虽...

用Java写数据结构作业——7-1 拯救007

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用java写数据结构作业——7.2堆并查集哈夫曼树二

数据结构第9周作业——堆并查集哈夫曼树二7-2 并查集【模板】 (60分)给出一个并查集，请完成合并和查询操作。输入格式:第一行包含两个整数N、M，表示共有N个元素和M个操作。接下来M行，每行包含三个整数Zi、Xi、Yi。当Zi=1时，将Xi与Yi所在的集合合并。当Zi=2时，输出Xi与Yi是否在同...

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