摘要：典型的表达式求值问题 栈来解决表达式问题，构建两个栈，一个是运算数栈，一个是运算符栈。 这篇题解应该是这道题里最麻烦的题解了，没有之一 题目链接：POJ 2106 Describe: The objective of the program you are going to produce is t 阅读全文

摘要：题目传送门：POJ 1363 Descirbe: There is a famous railway station in PopPush City. Country there is incredibly hilly. The station was built in last century. 阅读全文