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];
		int[] c = new int[n];

		for (int i = 0; i < n; i++) {
			v[i] = sc.nextInt();
		}

		for (int i = 0; i < n; i++) {
			c[i] = sc.nextInt();
		}

		int ans = 0;

		for (int i = 0; i < n; i++) {
			int value = v[i];
			int cost = c[i];

			if (value > cost) {
				ans += value - cost;
			}
		}
		System.out.println(ans);
		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