#include <iostream>
using namespace std;
int main(){
    int a, b, c;
    cin >> a >> b >> c;
    cout << a + a + b + a + b + c << endl;
    return 0;
}

include

using namespace std; int main(){

int a,b,c;
cin>>a>>b>>c;
cout<<3*a+2*b+c;	
return 0;

}