import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        sc.nextLine();
        String[] tmpV = sc.nextLine().split(" ");
        String[] tmpC = sc.nextLine().split(" ");

        int max = 0;
        for (int i = 0; i<N; i++) {
            int t = Integer.valueOf(tmpV[i])-Integer.valueOf(tmpC[i]);
            if (0<t) {
                max += t;
            }
        }

        System.out.println(max);
    }
}
/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