#include<iostream>
#include<vector>
#include<algorithm>
using namespace std;
int main()
{
	int N,M,L;
	cin>>N>>M>>L;
	vector<int>A,B;
	A.push_back(L);
	for(;N--;)
	{
		int a;cin>>a;
		B.clear();
		for(int t:A)
		{
			B.push_back(t);
			B.push_back((t+a)/2);
		}
		sort(B.begin(),B.end());
		B.erase(unique(B.begin(),B.end()),B.end());
		B.swap(A);
	}
	for(int a:A)if(a==M)
	{
		cout<<"Yes"<<endl;
		return 0;
	}
	cout<<"No"<<endl;
}