import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);       
		int n = sc.nextInt();
		int [] v = new int [n];
        int [] c = new int [n];
        for(int i=0;i<n;i++){v[i] = sc.nextInt();
                            }
        for(int i=0;i<n;i++){c[i] = sc.nextInt();
                            }
        int ans = 0;
        for(int i=0;i<n;i++){ans+=Math.max(0,v[i]-c[i]);
                            }
        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