import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();
		int[] values = new int[N];
		int[] costs = new int[N];
		
		for(int i = 0; i < N; i++) values[i] = sc.nextInt();
		for(int i = 0; i < N; i++) costs[i] = sc.nextInt();
		
		int ans = 0;
		for(int i = 0; i < N; i++){
			int profit = values[i] - costs[i];
			if(profit > 0) ans += profit;
		}
		
		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