#include <iostream>
using namespace std;
const int N = 1e2 + 10;
int a[5000], c[N];
int dp[N][N][N][N];
int main(){
	int m, n;
	cin >> n >> m;
	for(int i = 0; i < n; i++){
		int x;
		cin >> x;
		a[i] = x;
	}
	for(int i = 0; i < m; i++){
		int x;
		cin >> x;
		c[x]++;
	}
	for(int i = 0; i <= c[1]; i++)
		for(int j = 0; j <= c[2]; j++)
			for(int k = 0; k <= c[3]; k++)
				for(int l = 0; l <= c[4]; l++){
					int num = i * 1 + j * 2 + k * 3 + l * 4;
					if(i > 0)dp[i][j][k][l] = dp[i-1][j][k][l];
					if(j > 0)dp[i][j][k][l] = max(dp[i][j][k][l], dp[i][j-1][k][l]);
					if(k > 0)dp[i][j][k][l] = max(dp[i][j][k][l], dp[i][j][k-1][l]);
					if(l > 0)dp[i][j][k][l] = max(dp[i][j][k][l], dp[i][j][k][l-1]);
					dp[i][j][k][l] += a[num];
				}
	cout << dp[c[1]][c[2]][c[3]][c[4]];
	return 0;
}

C++ :

#include <iostream>
using namespace std;
int n,m;
int a[351];
int card[5];
int dp[41][41][41][41];
int Count(int c1,int c2,int c3,int c4)
{
	return (c1*1+c2*2+c3*3+c4*4)+1;
}
int main()
{
	cin>>n>>m;
	for(int i=1;i<=n;i++)
		cin>>a[i];
	for(int i=0;i<m;i++)
	{
		int temp;
		cin>>temp;
		card[temp]++;
	}
	dp[0][0][0][0] = a[1];
	for(int i=0;i<=card[1];i++)
		for(int j=0;j<=card[2];j++)
			for(int k=0;k<=card[3];k++)
				for(int l=0;l<=card[4];l++)
				{
					if(i>0)
						dp[i][j][k][l] = max(dp[i][j][k][l],dp[i-1][j][k][l]+a[Count(i,j,k,l)]);
					if(j>0)
						dp[i][j][k][l] = max(dp[i][j][k][l],dp[i][j-1][k][l]+a[Count(i,j,k,l)]);
					if(k>0)
						dp[i][j][k][l] = max(dp[i][j][k][l],dp[i][j][k-1][l]+a[Count(i,j,k,l)]);
					if(l>0)
						dp[i][j][k][l] = max(dp[i][j][k][l],dp[i][j][k][l-1]+a[Count(i,j,k,l)]);
				}


	cout<<dp[card[1]][card[2]][card[3]][card[4]]<<endl;
	return 0;
}