#include<stdio.h>
#include<stdlib.h>
#include<math.h>

int main(){
	int n,m;
	scanf("%d %d",&n,&m);
	int arr[100];
	int i;
	for(i=0;i<n;i++){
		scanf("%d",&arr[i]);
	}
	
	int sum=0;
	for(i=0;i<n;i++){
		sum += arr[i];
	}

	int count=0;
	double check;
	check = sum / (4*m);
	
	for(i=0;i<n;i++){
		if(arr[i] > check) count+=1;
	}
	
	if(count != m){
		printf("No");
	}else{
		printf("Yes");
	}
		
	return 0;
}