#include<iostream>
using namespace std;
int N,D,X,A,ans=0;
int main(void){
	cin>>N>>D>>X;
	ans=X;
	for(int i=0;i<N;i++){
		cin>>A;
		int sum=1;
		for(int i=A+1;i<=D;i+=A)sum++;
		ans+=sum;
	}
	cout<<ans;
	return 0;
}
