import std;
void main(){
	auto input = readln.chomp.split(" ").to!(long[]);
	long N = input[0];
	long X = input[1];
	long M = input[2];
	auto A = readln.chomp.split(" ").to!(long[]);
	long count = 0;
	for(auto i = N - 1; i >= 0; i--){
		A[i] >>= count;
		while(A[i] >= X){
			A[i] >>= 1;
			count++;
			M -= i + 1;
		}
	}
	writeln(M >= 0 ? "Yes" : "No");
}