C. Table Decorations

time limit per test

1 second

memory limit per test

256 megabytes

input

standard input

output

standard output

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.

Sample test(s)

input

5 4 3

output

input

1 1 1

output

input

2 3 3

output

这题一开始以为是模拟题，模拟了很久发现非常麻烦，后来看了代码，发现只要两个算式就行了。1、如果较小的两个数的和的两倍比第三个数小，那么直接输出这两个数的和，否则输出三个数的平均数。

#include<stdio.h>

#include<algorithm>

using namespace std;

int main()

{

	__int64 a[10];

	__int64 n,m,i,j;

	while(scanf("%I64d%I64d%I64d",&a[0],&a[1],&a[2])!=EOF)

	{

		sort(a,a+3);

		if((a[0]+a[1])*2<=a[2]){

			printf("%I64d\n",a[0]+a[1]);continue;

		}

		else printf("%I64d\n",(a[1]+a[2]+a[0])/3);

	}

	return 0;

}

巴特西

C. Table Decorations

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