C - 锻炼英语-贪心

You have r red, g green and b blue balloons. To decorate a single table for the banquet you need exactly three balloons. Three balloons attached to some table shouldn't have the same color. What maximum number t of tables can be decorated if we know number of balloons of each color?

Your task is to write a program that for given values r, g and b will find the maximum number t of tables, that can be decorated in the required manner.

Input

The single line contains three integers r, g and b (0 ≤ r, g, b ≤ 2·109) — the number of red, green and blue baloons respectively. The numbers are separated by exactly one space.

Output

Print a single integer t — the maximum number of tables that can be decorated in the required manner.

Examples

Input

5 4 3

Output

4

Input

1 1 1

Output

1

Input

2 3 3

Output

2

Note

In the first sample you can decorate the tables with the following balloon sets: "rgg", "gbb", "brr", "rrg", where "r", "g" and "b" represent the red, green and blue balls, respectively.

/*#include
#include
#include
using namespace std;
int main()
{
	long long r,g,b;
	long long s[3];
	for(int i=0;i<3;i++)
	cin>>s[i];
	sort(s,s+3);
	if(s[0]+s[1]>s[2]/2)
	printf("%lld",(s[0]+s[1]+s[2])/3);
	else 
	printf("%lld",s[0]+s[1]);
	return 0;
}*/
#include
#include
using namespace std;
long long s[5];
int main()
{
    while(cin>>s[0]>>s[1]>>s[2])
    {
        sort(s,s+3);    
        long long ans=(s[1]+s[2]-s[0]*2)/3+s[0]; 
        if(s[2]>(s[0]+s[1])*2)
          ans=s[0]+s[1];
        cout<

要相信自己，把想法转化为代码。