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];
		for (int i = 0; i < N; i++) {
			V[i] = sc.nextInt();
		}
		
		int[] C = new int[N];
		for (int i = 0; i < N; i++) {
			C[i] = sc.nextInt();
		}
		
		long ans = 0;
		for (int i = 0; i < N; i++) {
			if (C[i] < V[i]) {
				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