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 sum = 0;

		for (int i = 0; i < N; i++) {
			if (v[i] - c[i] > 0)
				sum += (v[i] - c[i]);
		}

		System.out.println(sum);
		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