Average mark

Problem

A teacher enters the marks of a class. The program should print the average mark rounded to 2 decimal places, such as 78.33. The starter holds a program with a bug. Find it and fix it.

Input, output and limits

Input: Line 1: the number of marks n. Line 2: n integers.
Output: One line with the average, rounded to 2 decimal places.
Constraints: 1 ≤ n ≤ 1000
0 ≤ each mark ≤ 100

Examples

Example

Input

3
70 80 85

Output

78.33

The sum is 235 and 235 / 3 is about 78.33.

Hints

Try the problem first. Open one hint at a time.

Hint 1

Divide the sum by n with the true division operator.

Hint 2

Format with :.2f so that 50 prints as 50.00.

Write your Python code, run it on the examples and submit it to hidden tests.

Solve in the editor

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