import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);

		// 整数の入力
		int n = sc.nextInt();

		int[] V = new int[n];

		for(int i=0;i<n;i++){
			V[i] = sc.nextInt();
		}

		int sum = 0;

		for(int i=0;i<n;i++){
			int vi = V[i];
			int ci = sc.nextInt();
			if(vi>ci)sum = sum + vi -ci;
		}

		// 出力
		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