It's almost time for mid-term marks and Mr. Sidhu, an excellent math teacher, wants to calculate the class average. Since Mr. Sidhu is such a high-performing teacher, many students (represented by ) have transferred into his math class (which initially had students), bringing along their grades from their previous class.
The problem is that Mr. Sidhu wants to see how the class average is affected after each student transfers into his class one by one. Being the nice student you are, you have decided to write him a program that does exactly that.
The first line of input will contain , the number of initial students in his class. This is then followed by lines, with each representing the mark of every initial student .
The next line consists of , which represents the number of students transferring into his class.
You may assume that their timetable changes have all been approved by the Guidance Department.
This is followed by lines, with every one of them showing the mark the student had in his or her initial class.
Note that for 80% of the marks, the additional constraints will hold:
The output should consist of lines, each containing the class average after each student transfers. Your output should be accurate to an absolute or relative error of .
Explanation for Sample Output