import java.io.PrintStream;
import java.util.Scanner;

public class Main {
    static final PrintStream so = System.out;
    static final Scanner sc = new Scanner(System.in);
    
    public static void main(String[] args) {
        int N = ni();
        int[] V = new int[N];
        int[] C = new int[N];
        for (int i = 0; i < N; i++) {
            V[i] = ni();
        }
        for (int i = 0; i < N; i++) {
            C[i] = ni();
        }
        
        int ans = 0;
        for (int i = 0; i < N; i++) {
            ans += Math.max(0, V[i] - C[i]);
        }
        so.println(ans);
    }
    
    static long gcd(long m, long n) {
        if(m < n) return gcd(n, m);
        if(n == 0) return m;
        return gcd(n, m % n);
    }
        
       
    static int ni() {
        return sc.nextInt();
    }
    
    static long nl() {
        return sc.nextLong();
    }

    static char[] nsToChars() {
        return sc.next().toCharArray();
    }
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz