import java.util.Scanner;

public class Main {

	public static void main(String[] args) {

		Scanner scanner = new Scanner(System.in);
		int N = scanner.nextInt();
		int[] V = new int[N];
		int[] C = new int[N];
		int answer = 0;
		
		for(int i = 0; i < N; i++){

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

			C[i] = scanner.nextInt();
		}
		for(int i = 0; i < N; i++){
		
			if (V[i] - C[i] > 0){
				
				answer = answer + (V[i] - C[i]); 
			}
		}
		System.out.println(answer);
	}
}

/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