zengjingchao的博客

Suppose a bank has N windows open for service. There is a yellow line in front of the windows which devides the waiting area into two parts. The rules for the customers to wait in line are:The s

Mice and Rice is the name of a programming contest in which each programmer must write a piece of code to control the movements of a mouse in a given map. The goal of each mouse is to eat as much rice

问题描述 　　队列操作题。根据输入的操作命令，操作队列（1）入队、（2）出队并输出、（3）计算队中元素个数并输出。 输入格式 　　第一行一个数字N。 　　下面N行，每行第一个数字为操作命令（1）入队、（2）出队并输出、（3）计算队中元素个数并输出。 输出格式 　　若干行每行显示一个2或3命令的输出结果。注意：2.出队命令可能会出现空队出队（下溢），请输出“no”，并退出。 样例输入