import java.io.*;
import java.util.*;


class Main {
    public static void main(String[] args) {
        MyScanner sc = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));
        int n=sc.nextInt();
        int[]a=sc.nextIntArray(n);
        int[]x=sc.nextIntArray(n);
        int[]y=sc.nextIntArray(n);
        MinBIT m1=new MinBIT();
        MinBIT p1=new MinBIT();
        long[]dp=new long[n+1];
        for(int i=0;i<=n;++i){
            // update
            if(i<n){
                m1.update(300001-x[i],x[i]+y[i]+dp[i]);
                p1.update(1+x[i],-x[i]+y[i]+dp[i]);
            }
            // query
            if(i<n){
                long ans=Long.MAX_VALUE;
                int curA=a[i];
                ans=Math.min(ans,m1.query(300001-curA)-curA);
                ans=Math.min(ans,p1.query(curA+1)+curA);
                dp[i+1]=ans;
            }
            if(false){
                System.err.print("m1-acc:");
                for(int j=0;j<10;++j){
                    System.err.print(" "+m1.query(j+1));
                }
                System.err.println();
                System.err.print("p1-acc:");
                for(int j=0;j<10;++j){
                    System.err.print(" "+p1.query(j+1));
                }
                System.err.println();
            }
        }
        out.println(dp[n]);
        out.close();
    }
    // http://codeforces.com/blog/entry/7018
    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;
    //-----------MyScanner class for faster input----------
    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;
        public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }
        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
        int nextInt() {
            return Integer.parseInt(next());
        }
        long nextLong() {
            return Long.parseLong(next());
        }
        double nextDouble() {
            return Double.parseDouble(next());
        }
        String nextLine(){
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
        int[] nextIntArray(int n){
            int[]r=new int[n];
            for(int i=0;i<n;++i)r[i]=nextInt();
            return r;
        }
    }
}
class MinBIT {
    static final int SIZE = 1 << 19;
    static final long INFINITY = (1L << 62) - 1;
    long[] bit;
    MinBIT() {
	this.bit = new long[SIZE];
        Arrays.fill(this.bit,INFINITY);
    }
    void update(int x, long value) {
        while(x<SIZE){
            bit[x]=Math.min(bit[x],value);
            x+=x&(-x);
        }
    }
    long query(int x) {
        long y = INFINITY;
	while(x>0){
            y=Math.min(y,bit[x]);
            x&=x-1;
	}
	return y;
    }
}