import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner s = new Scanner(System.in);
        //N,V,Cを取り込む
        int N = s.nextInt();
        int Vn[] = new int[N];
        int Cn[] = new int[N];

        for(int i=0;i<N;i++){
            Vn[i]=s.nextInt();
        }
        for(int i=0;i<N;i++){
            Cn[i]=s.nextInt();
        }
        int ans=0;
        //V-Nを計算して、1以上ならansに足していく
        for(int i=0;i<N;i++){
            int check=0;
            check=Vn[i]-Cn[i];
            if(check>0){
                ans+=check;
            }
            check=0;
        }
        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