1676 - The English Problem

Attention!!(警告!!)

You must translate this problem yourself!!
You mustn't use translators!!
(自分の手でこの問題を翻訳してください!!翻訳機は使わないでください!!)

Story

You are a student of Shizuoka Prefectural Hamamatsu Technical High School.
You have three friends. You have taken exams of five subjects.
You are thinking of analyzing the data.

Problem

Find the average score for a total of twenty exams.
However, if the answer contains a decimal point, round off to the first decimal place.

Input

Scores for each of the five subjects

Output

Average of all five subjects

Constraints

The following is satisfied for all I / O cases.
The score is a variable called score.

• $0 ≦ score ≦ 100$

Input / output example

Input example 1

3 7 5 6 4
85 92 97 89 93
35 42 51 33 52
0 0 0 0 0

Output example 1

35

Input example 2

81 90 98 85 93
56 47 63 52 63
35 82 43 36 52
100 100 95 90 88

Output example 2

72

Input example 3

100 100 100 100 100
100 100 100 100 100
100 100 100 100 100
100 100 100 100 99

Output example 3

100