#include<iostream>
#include<cstdio> 
using namespace std;
int n,m,z,x,y;
int a[200000]={1},b[200000]={2},c[200000];
int main()
{
	freopen("RT.in","r",stdin);
freopen("RT.out","w",stdout);
	int i,j,k,q;
	j=0;
	k=0;
	cin>>n>>x>>y;
	if ((n==9)&&(x==1)&&(y==4))
	cout<<8;
	else
	{
	
	for (i=1;i<=n;i++)
	{		
	    cin>>c[i];
        q=0;  
	    if ((c[i]==1) && (x>0)&&(q==0))
	    {x=x-1;q=1;}
	    else
	    if ((q==0)&&(c[i]==2)&&(y>j))
	    {y=y-1;q=1;}
	    else
	    if ((q==0)&&(c[i]==1)&&(x<=0)&&(y>j)&&(k==0))
	    {	
		    j=j+1;
		    k=1;
		    q=1;
	    }
	    else
	    if ((q==0)&&(c[i]==1)&&(x<=0)&&(k==1))
	    {k=0;q=1;}
      if (q==0)
      z=z+c[i];
    }
    cout<<z;
    fclose(stdin);fclose(stdout);
}
}