#include<bits/stdc++.h>
using namespace std;
int rec(int idx, int x, int y, int z, vector<int>&a)
{
        if(idx>=(int)a.size())return 0;
        int res=rec(idx+1, x, y, z, a);
        if(x>0){
            res=max(res, rec(idx+1, x-1, y, z,a)+a[idx]);
        }
        if(y>0 && idx+1<a.size()){
            res=max(res, rec(idx+2, x, y-1, z,a)+a[idx]+a[idx+1]);
        }
        if(z>0 && idx+2<a.size()){
            res=max(res, rec(idx+3, x, y, z-1,a) + a[idx]+a[idx+1]+a[idx+2]);
        }
        return res;
 
 
}
int main(){
   int n; cin>>n;
   vector<int>a(n);
   int x, y,z; cin>>x>>y>>z;
   for(int i=0;i<n;i++)
   {
       cin>>a[i];
   }
   cout<<rec(0, x, y, z, a);
}

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