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java 要用 BufferedReader 才能过，代码中不要有Scannerjava 要用 BufferedReader 才能过，代码中不要有Scanner， 否则会超时。 14172MS 过的。 其实用哈希查找搜索的时间是很短的， 一般在 1ms 以内。 相信JAVA 类库， 还是很强大的。 Followed by:
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