#include <bits/stdc++.h>
using namespace std;
int main(){
	int base[50000];
	memset(base,0,sizeof(base));
	int s1,s2,s3;5
	cin>>s1>>s2>>s3;
	for(int i=1;i<=s1;i++)
		for(int j=1;j<=s2;j++)
			for(int m=1;m<=s3;m++){
				//cout<<i<<" "<<j<<" "<<m<<" "<<i+j+m<<endl;
				base[i+j+m]++;
			}
	int cache=0;
	for(int a=1;a<=s1+s2+s3;a++){
		//cout<<base[a]<<" ";
		if(base[a]>cache){
			cache=a;
		}
	}
	cout<<cache;
	return 0;
}