import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int[] price = new int[N];
        
        for(int i = 0;i < N;i++) {
        	price[i] = sc.nextInt();
        }
        
        int benefit = 0;
        
        for(int i = 0;i < N;i++) {
        	int a = sc.nextInt();
        	if(price[i] > a) {
        		benefit += price[i] -a;
        	}
        }
        System.out.println(benefit);
    }
}
/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