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 ans = 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]){
        ans += a[i] - b[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