import java.util.*;
 
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int N = sc.nextInt();
    int []a = new int[N];
    int []b = new int[N];
    int sum=0;
    for(int i=0;i<N;i++){
      a[i]=sc.nextInt();
    }
    for(int i=0;i<N;i++){
        b[i]=sc.nextInt();
    }
    for(int i =0;i<N;i++)
        if(a[i]>b[i]){
            sum= sum + a[i]-b[i];
        }
    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