#include<bits/stdc++.h> using namespace std; int main(){

int a,b,c;
cin>>a>>b>>c;
cout<<a/10*2+b/10*3+c/10*5;
return 0;

}

#include <bits/stdc++.h>
using namespace std;
int main(){
    int a,b,c;
    cin>>a>>b>>c;
    int z=a*0.2+b*0.3+c*0.5;
    cout<<z;
    return 0;
}