By Neilor Tonin, URI Brazil
Mangojata is learning Computer Programming. She finds everything very easy, very simple. She is going to make a small program that reads the names of your friends and the distance from his home to each of them. Therefore, she simply want to calculate what is the average distance between her house and her friends house (in meters). But Aristoclenes, a much more experienced programmer warned her that sometimes what seems simple can have some details, depending on the programming language used for implementation.
The input contains several test cases. Each test case is composed by two lines. The first line contains the name of a friend of Mangojata. The second line contains an integer number that indicates the average distance between Mangojata's house and the house of a friend.
The output must be a number with one digit after the decimal point (please use a double precision variable) indicating the average distance between Mangojata's house and the house of her friends, like the following example.
|Sample Input||Sample Output|