C++ :

#include<bits/stdc++.h>
using namespace std;
int n,a[55],ans,x;
int main()
{
//	freopen("745.in","r",stdin);
//	freopen("745.out","w",stdout);	
	cin>>n;
	for(int i=0;i<n;i++)
		cin>>a[i];
	for(int i=0;i<n;i++)
	{
		cin>>x;
		if(a[i]>x) ans++;
	}
	cout<<ans;
    return 0;
}