2016年6月12日

Collections.addAll 为什么比collection.addall 快(转)

摘要： from: http://stackoverflow.com/a/3343829/5032462 在stackoverflow上看到的一篇回答，老外真是太professional了，mark一下。最后的summary值得看一下。 The Java API docs say the following 阅读全文

posted @ 2016-06-12 16:35 北门煎饼东门串儿 阅读(984) 评论(0) 推荐(0) 编辑

1015. Reversible Primes (20)

摘要： A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. For example in the decimal system 73 is a re 阅读全文

posted @ 2016-06-12 09:52 北门煎饼东门串儿 阅读(145) 评论(0) 推荐(0) 编辑

1010. Radix (25)

摘要： 1011. World Cup Betting (20) With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best players 阅读全文

posted @ 2016-06-12 09:45 北门煎饼东门串儿 阅读(162) 评论(0) 推荐(0) 编辑

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