def getSum(n,a,b): res = [0]*n res[0] =a[0]-b[0] for i in range(1,n): res[i] = res[i-1]+a[i]-b[i] return sum(res) if __name__ =='__main__': n = int(input()) a = list(map(int,input().split())) b = list(map(int,input().split())) print(getSum(n,a,b))