#P322B. Ciel and Flowers

Ciel and Flowers

No submission language available for this problem.

Description

Fox Ciel has some flowers: r red flowers, g green flowers and b blue flowers. She wants to use these flowers to make several bouquets. There are 4 types of bouquets:

  • To make a "red bouquet", it needs 3 red flowers.
  • To make a "green bouquet", it needs 3 green flowers.
  • To make a "blue bouquet", it needs 3 blue flowers.
  • To make a "mixing bouquet", it needs 1 red, 1 green and 1 blue flower.

Help Fox Ciel to find the maximal number of bouquets she can make.

The first line contains three integers r, g and b (0 ≤ r, g, b ≤ 109) — the number of red, green and blue flowers.

Print the maximal number of bouquets Fox Ciel can make.

Input

The first line contains three integers r, g and b (0 ≤ r, g, b ≤ 109) — the number of red, green and blue flowers.

Output

Print the maximal number of bouquets Fox Ciel can make.

Samples

3 6 9

6

4 4 4

4

0 0 0

0

Note

In test case 1, we can make 1 red bouquet, 2 green bouquets and 3 blue bouquets.

In test case 2, we can make 1 red, 1 green, 1 blue and 1 mixing bouquet.