DMPG '18 B1 - Pizza Orders

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Points: 3
Time limit: 1.0s
Memory limit: 64M

Problem type

Roger is ordering pizza for DMPG. He knows that there are P people who want to eat pepperoni pizza, C people who want to eat cheese pizza, and V people who want vegetarian pizza. If a single pizza feeds 3 people, how many pizzas will Roger have to order?


0 \le P, C, V \le 1\,000\,000\,000

Input Specification

The first line will contain three space separated integers, P, C, and V.

Output Specification

A single integer, the total number of pizzas Roger has to order.

Sample Input

6 7 8

Sample Output


Explanation for Sample Output

Roger has to order 2 pepperoni pizzas, 3 cheese, and 3 vegetarian pizzas.


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