
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner scan =new Scanner(System.in);
        int gokei = Integer.parseInt(scan.nextLine());
        String[] kachiStr = scan.nextLine().split(" ");
        String[] costStr = scan.nextLine().split(" ");
        
        
        int answer = 0;
        for(int i = 0; i < gokei ; i++){
            int rieki = Integer.parseInt(kachiStr[i]) - Integer.parseInt(costStr[i]);
            if(rieki > 0 ){
                answer += rieki; 
            }
        }
        
        System.out.println(answer);

    }
    
}

/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