C++ :

#include<bits/stdc++.h>
using namespace std;
int n,b[10101],z;
void work(int d,int s)
{
	if(s==z)
	{
		cout<<"YES";
		exit(0);
	}
	if(d>n)
	{
		return;
	}
	for(int i=1;i<=n;i++)
	{
		work(d+1,s);
		work(d+1,s+b[i]);
	}
}
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)
	{
		cin>>b[i];
	}
	cin>>z;
	work(1,0);
	cout<<"NO";	
	return 0;
}