#include <bits/stdc++.h>
using namespace std;

int main()
{
	int N, X, M;
	cin >> N >> X >> M;
	vector<int> A( N );
	for( int i = 0; i < N; i++ ) cin >> A[i];

	string ans = "Yes";
	int j = 0;
	for( int i = N - 1; i >= 0; i-- ) {
		if( j == 0 ) {
			if( A[i] < X ) continue;
			while( A[i] >= X ) {
				j++;
				M -= i + 1;
				if( M < 0 ) {
					ans = "No";
					break;
				}
				A[i] /= 2;
			}
		}
		else {
			A[i] >>= j;
			while( A[i] >= X ) {
				j++;
				M -= i + 1;
				if( M < 0 ) {
					ans = "No";
					break;
				}
				A[i] /= 2;
			}
		}
		if( ans == "No" ) break;
	}
	cout << ans << endl;
}