import java.util.*;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner(System.in);
		int n = Integer.parseInt(sc.nextLine());
		List<String> vl = Arrays.asList(sc.nextLine().split(" "));

		List<String> cl = Arrays.asList(sc.nextLine().split(" "));

		int result = 0;

		for(int i=0; i<n;i++) {
			int v = Integer.parseInt(vl.get(i));
			int c = Integer.parseInt(cl.get(i));
			if(v-c>0) {
			result += (v-c);
			}
		}
		System.out.println(result);
	}
}
/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