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Given a tree, you are supposed to list all the leaves in the order of top down, and left to right. Input Specification: Each input file contains one t 阅读全文
摘要:
7-1 Maximum Subsequence Sum(25 分) Given a sequence of K integers { N1, N2, ..., NK }. A continuous subsequence is defined to be { Ni, Ni+ 阅读全文
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CRUD操作 1.从实体类参数中取值 #{属性名} select * from user where username = #{username} 2.当sql语句只有一个参数且参数类型是基本类型或基本类型包装类时,大括号(#{占位符})中的占位符可以随意写(id/userid/uid/...)。 阅读全文