#include "bits/stdc++.h"
using namespace std;
#define int long long
#define endl '\n'
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for(int i=int(a);i<int(b);i++)
#define pb emplace_back
#define all(x) (x).begin(),(x).end()
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;

signed main(){
	int n;
	cin>>n;
	vector<int> a(n);
	vector<int> b(n);
	rep(i,n)cin>>a[i];
	rep(i,n)cin>>b[i];
	int ans=0;
	rep(i,n)if(a[i]>b[i])ans+=a[i]-b[i];
	cout<<ans<<endl;
}

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