#include<iostream>
using namespace std;
int N,X,M;
int A[2<<17];
main()
{
	cin>>N>>X>>M;
	for(int i=0;i<N;i++)cin>>A[i];
	int del=0;
	for(int i=N;i--;)
	{
		A[i]>>=del;
		while(A[i]>=X)
		{
			del++;
			A[i]>>=1;
			M-=i+1;
		}
	}
	cout<<(M<0?"No":"Yes")<<endl;
}