import java.util.*;

public class Main {
  public static void main(String[] args ) throws Exception {
    Scanner sc = new Scanner(System.in);

    int N = sc.nextInt();
    int M = sc.nextInt();
    int total = 0;
    int count = 0;

    int[] S = new int[N];
    
    for(int i = 0; i < N; i++) {
        int token = sc.nextInt();
        S[i] = token;
        total += token;
    }
    
    for(int i = 0; i < N; i++) {
        if( S[i] * 4 * M >= total) count++;
    }
    
    
    if(count >= M) {
        System.out.println("Yes");
    }else {
        System.out.println("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