#include<iostream> 
#include<cstdio> 
#include<cmath> 
#include<algorithm> 
#include<cstring> 
#include<string> 
using namespace std;
int arr[100];
int main(){
	int s1,s2,s3;
	cin >> s1 >> s2 >> s3;
	int res = 0;
	for(int i=1;i<=s1;i++){
		for(int j=1;j<=s2;j++){
			for(int k=1;k<=s3;k++){
				arr[i+j+k]++;
				if(arr[i+j+k]>arr[res]){
					res = i+j+k;
				}
			}
		}
	}
	cout << res; 
	return 0;
}