Ciel and Flowers
题意翻译
Fox Ciel有r朵红花,g朵绿花和b朵蓝花。她想用这些花做几个花束。
有四种类型的花束:
- 制作“红色花束”,要3朵红花
- 制作“绿色花束”,要3朵绿花
- 制作“蓝色花束”,要3朵蓝花
- 制作“混合花束”,要1朵红,1朵绿和1朵蓝花
输出可以制作的最大数量的花束。
题目描述
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.
输入输出格式
输入格式
The first line contains three integers $ r $ , $ g $ and $ b $ ( $ 0<=r,g,b<=10^{9} $ ) — the number of red, green and blue flowers.
输出格式
Print the maximal number of bouquets Fox Ciel can make.
输入输出样例
输入样例 #1
3 6 9
输出样例 #1
6
输入样例 #2
4 4 4
输出样例 #2
4
输入样例 #3
0 0 0
输出样例 #3
0
说明
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.