#include <iostream>
using namespace std;
int main()
{
	int s1, s2, s3;
	cin >> s1 >> s2 >> s3;
	int n = s1 + s2 + s3;
	int a[20], b[20], c[40];
	int sum[78];
	for (int i = 0; i < s1; i++)
	{
		a[i] = i+1;
	}
	for (int i = 0; i < s2; i++)
	{
		b[i] = i + 1;
	}
	for (int i = 0; i < s3; i++)
	{
		c[i] = i + 1;
	}
	int num = 0;
	for (int i = 0; i < s1; i++)
	{
		for (int j = 0; j < s2; j++)
		{
			for (int k = 0; k < s3; k++)
			{
				num= a[i] + b[j] + c[k];
				sum[num-3]++;
			}
		}
	}
	int max = 0;
	int m = 0;
	for (m = 0; m < s1 + s2 + s3-2; m++)
	{
		if (max < sum[m])
			max = sum[m];
	}
	for (m = 0; m < s1 + s2 + s3-2; m++)
	{
		if (max==sum[m]);
		{
			cout << (m+3) << endl;
			break;
		}
	}
	return 0;
}