#include<bits/stdc++.h>
#define ll long long
#define int long long
using namespace std;

inline void up(int &a,const int &b){ if(a<b)a=b; }
const int maxn = 200;
const int maxk = 12;
const int inf  = 1e15;

int n,K,W;
int ci[maxn],mi[maxn];
int pi[maxn];

int f[maxn][maxn][maxk],g[maxn][maxn];

signed main()
{
	ios_base::sync_with_stdio(false);
	
	cin>>n>>K>>W;
	for(int i=1;i<=n;i++) cin>>ci[i];
	for(int i=1;i<=n;i++) cin>>mi[i];
	for(int i=K;i<=2*K-2;i++) cin>>pi[i];
	
	for(int i=1;i<=n;i++) 
	{
		for(int k=0;k<=K;k++) f[i][i][k]=-inf;
		f[i][i][mi[i]]=0;
		g[i][i]= pi[K]-W*(K-mi[i]);
	}
	for(int L=2;L<=n;L++)
	{
		for(int r=L;r<=n;r++)
		{
			int l= r-L+1;
			
			g[l][r]=-inf;
			for(int k=0;k<=K;k++) f[l][r][k]=-inf;
			
			for(int mid=l+1;mid<=r;mid++)
			{
				//f+f
				if(ci[l]==ci[mid])
				{
					for(int x=1;x<K;x++) for(int y=1;y<K;y++) 
					{
						if(x+y>=K)
						{
							up(g[l][r],f[l][mid-1][x]+f[mid][r][y]+pi[x+y]);
						}
						else
						{
							up(f[l][r][x+y],f[l][mid-1][x]+f[mid][r][y]);
						}
					}
				}
				//f+g
				for(int x=1;x<K;x++) up(f[l][r][x],f[l][mid-1][x]+g[mid][r]);
				//g+f
				//for(int y=1;y<K;y++) up(f[l][r][y],g[l][mid-1]+f[mid][r][y]);
				//g+g
				up(g[l][r],g[l][mid-1]+g[mid][r]);
			}
		}
	}
	cout<<g[1][n]<<endl;
	
	return 0;
}