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Alesis is worrying about the $\text{CO}_2$ emissions produced by his petrol car.

Task

Write a program that takes, as input, the litres of petrol he uses each month of a year.

Constraints:

[Note: you do not need to check constraints in your code for this competition - they are just for information about the range of test data values.]

• The monthly figures are given in whole litres.
• Monthly litres supplied are between 0 and 200 (inclusive).
• 1 litre of petrol produces 0.0024 tonnes of $\text{CO}_2$ when burnt. (We are ignoring extraction, refining, etc.)

Input format:

• A row of 12 integers separated by spaces.

Output format:

• An integer representing the tonnes of $\text{CO}_2$ produced, rounded down to the nearest tonne.

Example:

142 150 120 182 202 205 231 258 214 162 148 122

5

Calculation using example input data:

Annual C02 = 0.0024 x total litres
           = 5.1264
           = 5 tonnes