import java.util.Scanner;

public class Main{
	public static void main(String[] args) {
		Scanner sc =  new Scanner(System.in);
		int number = sc.nextInt();
		int[] values = new int[number];
		int[] costs = new int[number];
		int sum = 0;
		
		for(int i=0;i<number;i++)
			values[i] = sc.nextInt();
		for(int i=0;i<number;i++) {
			costs[i] = sc.nextInt();
			if(values[i]-costs[i]>0)
				sum += values[i]-costs[i];
		}
		sc.close();
		System.out.println(sum);
	}
}
/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