有25匹馬,每匹馬都以一個(gè)固定不變的速度奔跑,每匹馬的速度都不一樣,如果讓你找出跑的最快的5匹馬,最少需要組織多少場(chǎng)比賽?注:每場(chǎng)比賽最多只能5匹馬參賽。
re:悲觀10場(chǎng),樂觀7場(chǎng)。
re:悲觀10場(chǎng),樂觀7場(chǎng)。
七段無論怎樣,請(qǐng)讓我先感謝一下國家。 |
2010年7月18日 #
Framework | Supported log levels | Standard appenders | Popularity | Cost / licence |
---|---|---|---|---|
Log4J | FATAL ERROR WARN INFO DEBUG TRACE | AsyncAppender, JDBCAppender, JMSAppender, LF5Appender, NTEventLogAppender, NullAppender, SMTPAppender, SocketAppender, SocketHubAppender, SyslogAppender, TelnetAppender, WriterAppender | Widely used in many project and platforms | Apache License, Version 2.0 |
Java Logging API | SEVERE WARNING INFO CONFIG FINE FINER FINEST | Depends on the underlying framework; Sun's default Java Virtual Machine (JVM) has the following: ConsoleHandler, FileHandler, SocketHandler, MemoryHandler | Not widely used[citation needed] | Comes with the JRE |
Apache Commons Logging | FATAL ERROR WARN INFO DEBUG TRACE | Depends on the underlying framework | Widely used, in conjunction with log4j | Apache License, Version 2.0 |
SLF4J | ERROR WARN INFO DEBUG TRACE | Depends on the underlying framework, which is pluggable | Probably small but growing | MIT License |