import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int[] v = new int[N], c = new int[N];
		int sum = 0;

		for(int i = 0;i<N;i++)
			v[i] = sc.nextInt();

		for(int j = 0; j<N; j++)
			c[j] = sc.nextInt();

		for(int i = 0;i < N;i++) {
			int b = v[i] - c[i];
			if(b>0)
				sum+=b;
		}

		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