import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] v = new int[N];
		int[] c = new int[N];
		int count=0;
		
		for(int i=0;i<N;i++) {
			v[i]=sc.nextInt();
		}
		for(int i=0;i<N;i++) {
			c[i]=sc.nextInt();
		}
		
		for(int i=0;i<N;i++) {
			if(v[i]-c[i]>=1) {
				count+=v[i]-c[i];
			}
		}
		System.out.println(count);
		sc.close();
	}
}

/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