import java.util.*;
public class Main {
	//定義関数から参照できる変数定義はこの辺
	static int N;
	static int V [];
	static int C [];
	static int ans=0;
	public static void main(String[] args) {
    	Scanner sc = new Scanner(System.in);
		//long Var_name = sc.nextLong();
    	N=sc.nextInt();
    	V=new int[N+1];
    	C=new int[N+1];

    	for(int i=1;i<=N;i++){
    		V[i]=sc.nextInt();
    		//C[i]=sc.nextInt();
    	}


    	for(int i=1;i<=N;i++){
    		C[i]=sc.nextInt();
    	}

    	for(int i=1;i<=N;i++){
    		if (V[i]>C[i]) {
    			ans=ans+(V[i]-C[i]);
    		}
    	}



		System.out.println(ans);
		//System.out.print(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