This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <iostream>
#define int long long
using namespace std;
const int INF=1e18;
int dp[2][5001][2][2],k,n,m,a,b,v[1001],s[5001],t[5001],res=-INF;
int32_t main(){
ios_base::sync_with_stdio(NULL);
cin >> k >> n >> m >> a >> b;
for (int i=1;i<=k;i++)
cin >> v[i];
for (int i=1;i<=n;i++)
cin >> s[i];
for (int i=0;i<m;i++)
cin >> t[i];
for (int i=0;i<=m;i++){
for (int j=0;j<2;j++)
for (int k=0;k<2;k++){
dp[0][i][j][k]=(i==m?0:a*k+b*(m-i));
dp[1][i][j][k]=-INF;
}
}
for (int i=n;i>=1;i--){
for (int j=m;j>=0;j--){
for (int k=0;k<2;k++)
for (int l=0;l<2;l++){
dp[1][j][k][l]=max((j==m?0:a*k+b*(m-j)),dp[0][j][0][l]+a*k+b);
if (j==m)
continue;
dp[1][j][k][l]=max(dp[1][j][k][l],max((s[i]==t[j]?dp[0][j+1][1][1]+v[t[j]]:-INF),dp[1][j+1][k][0]+b+a*l));
}
}
res=max(res,dp[1][0][1][1]);
for (int j=m;j>=0;j--){
for (int k=0;k<2;k++)
for (int l=0;l<2;l++){
swap(dp[0][j][k][l],dp[1][j][k][l]);
dp[1][j][k][l]=-INF;
}
}
}
cout << res;
}
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