Description

When sending text messages on a mobile phone, each message costs $0.1 yuan, but the content of each message is limited to 70 characters (inclusive). If a message exceeds 70 characters, it will be split into multiple messages according to the 70-character limit. Given the number of characters in each message sent by someone in a month, calculate the total cost of their text messages.

Input Format

The first line contains an integer $n$ ($1≤n≤100$), representing the total number of messages sent in the month. This is followed by $n$ lines, each containing an integer (not exceeding 1000) representing the number of characters in each message.

Output Format

Output a single line containing the total cost of text messages for the month, in yuan, with one decimal place.

Sample

10
39
49
42
61
44
147
42
72
35
46

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