import java.util.*;
public class Main {
    public static void main(String[] args) {
    
    Scanner sc = new Scanner(System.in);
      
      //入力
      int n = sc.nextInt();//宝石数
      
      //配列
      int value[] = new int[n];
      int cost[]  = new int[n];
      
      int truth =0;
      int max =0;
      
      //宝石の価値の配列作成
      for(int i=0; i<n; i++){
        value[i] = sc.nextInt();
      }
      
      //コストの配列作成  
      for(int i=0; i<n; i++){
        cost[i]  = sc.nextInt();
      }   
     
      for(int i=0; i<n; i++){
       //価値からコストを引くことで「真の価値」を求める
      	if(value[i]>=cost[i] && cost[i]>=0){
          truth = value[i] - cost[i];
          max += truth;   
        }
      }
      System.out.println(max);
    }
}
/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