import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);

		int n = Integer.valueOf(sc.next());

		int v[] = new int[n];
		for (int i = 0; i < v.length; i++) {
			v[i] = Integer.valueOf(sc.next());
		}
		int a = 0;
		for (int i = 0; i < v.length; i++) {
			int c = Integer.valueOf(sc.next());
			if (c < v[i]) {
				a = a + v[i] - c;
			}
		}
		System.out.println(a);
	}

}

/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