#include <iostream>
#include <cstdio>
#include <cstring>
#define maxn 100005
#define rint register int

using namespace std;

int n,m,temp;
int a[maxn],num[5];
int f[42][42][42][42];

int main()
{
	freopen("tortoise.in","r",stdin);
	freopen("tortoise.out","w",stdout);
    ios::sync_with_stdio(0);
    cin>>n>>m;
    for(rint i=1;i<=n;i++)cin>>a[i];
    for(int i=1;i<=m;i++){
        cin>>temp;
        num[temp]++;
    }
    f[0][0][0][0]=a[1];
    for(rint i=0;i<=num[1];i++)
        for(rint j=0;j<=num[2];j++)
            for(rint k=0;k<=num[3];k++)
                for(rint l=0;l<=num[4];l++){
                    int x=i+j*2+k*3+l*4+1;
                    if(i)f[i][j][k][l]=max(f[i][j][k][l],f[i-1][j][k][l]+a[x]);
                    if(j)f[i][j][k][l]=max(f[i][j][k][l],f[i][j-1][k][l]+a[x]);
                    if(k)f[i][j][k][l]=max(f[i][j][k][l],f[i][j][k-1][l]+a[x]);
                    if(l)f[i][j][k][l]=max(f[i][j][k][l],f[i][j][k][l-1]+a[x]);

                }
    cout<<f[num[1]][num[2]][num[3]][num[4]]<<'\n';
    return 0;
}