//Referred Professors code
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
 
public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());
        int M = Integer.parseInt(st.nextToken());
        int total = 0;
        int[] A = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0;i<N;i++){
            A[i] = Integer.parseInt(st.nextToken());
            total += A[i];
        }
        int count = 0;
        for(int i=0;i<N;i++){
            if (A[i] >= (total * 0.25/ M)){
                count++;
            }
        }
        System.out.println(count>=M?"Yes":"No");
        
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz