我家有个zz~

Description CC always becomes very depressed at the end of this month, he has checked his credit card yesterday, without any surprise, there are only 99.9 yuan left. he is too distressed and thinking

二分......

Do more with lessDescription Given two strings a and b we define a*b to be their concatenation. For example, if a = “abc” and b = “def” then a*b = “abcdef”. If we think of concatenation as multiplica

Discussion Your task is to write a program of a simple dictionary which implements the following instructions: insert str: insert a string str in to the dictionary find str: if the distionary c