#include<bits/stdc++.h>
using namespace std;
int a[11];bool f[10001];
int main(){
	freopen("gxxm.in","r",stdin);
	freopen("gxxm.out","w",stdout);
	int n,b,ans=0;
	cin>>n;
	for(int i=1;i<=n;i++)cin>>a[i];
	cin>>b;
	f[1]=1;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=b-1;j++)
			f[a[i]*j+1]=1;
	for(int i=1;i<=10000;i++)if(f[i])ans++;
	cout<<ans;
	fclose(stdin);
	fclose(stdout);
	return 0;
}

我代码也看不出问题呀