import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int v[] = new int[n + 1];
		int c[] = new int[n + 1];
int ans=0;
		for(int i=1;i<=n;i++){
		v[i]=sc.nextInt();
		}
		for(int i=1;i<=n;i++){
		c[i]=sc.nextInt();

		if(v[i]>=c[i]){
		ans=ans+v[i]-c[i];
		}}
System.out.println(ans);
	}}
/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