#include <iostream>
#include <cmath>

using namespace std;

int x1;
int x2;
int x3;
int x4;
int taxi()
{
    int s;
    int y1;
    int y2;
    int y3;
    int y4;
    if (x1%4==0)
        y1= x1/4 ;
    if (x1%4!=0)
        y1= x1/4 + 1;
    if (x2%2==0)
        y2= x2/2 ;
    if (x2%2!=0)
        y2= x2/2 +1;
    y3= x3;
    y4= x4;
    s= y1 + y2 + y3 + y4;
    return s;
}
int main()
{
    cin>>x1>>x2>>x3>>x4;
    cout << taxi();
    return 0;
}