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欢迎光临天资小屋：http://user.qzone.qq.com/593830943/main
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KMP字符串模式匹配具体解释：
http://www.cppblog.com/oosky/archive/2006/07/06/9486.html
KMP算法具体解释：http://www.matrix67.com/blog/archives/115