摘要：The "eight queens puzzle" is the problem of placing eight chess queens on an 8 chessboard so that no two queens threaten each other. Thus, a solution 阅读全文

摘要：Anaconda是一个非常好的python管理软件，实际使用起来要比直接用python自带的管理工具更好。 若需要将Anaconda下的python.exe添入环境变量中，需要如下设置 如上图所示，需要两个地址，方能顺利在cmd中访问 阅读全文

摘要：Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino 阅读全文