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+N];
    int x=0;
    for(int i=0;i<2*N;i++){
      if(i<N){V[i]=sc.nextInt();}
      else{V[i]=V[i-N]-sc.nextInt();
           if(V[i]>0){x=x+V[i];}}}
    System.out.println(x);
  }
}
/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