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

int main(){
	int n,m;
	scanf("%d %d",&n,&m);
	int arr[n];
	int i,j;
	for(i=0;i<n;i++){
		scanf("%d",&arr[i]);
	}
	
	int sum=0;
	for(i=0;i<n;i++){
		sum += aarr[i];
	}
	
	for (i=0; i<n; i++) {
    	for (j=i+1; j<n; j++) {
      		if (arr[i] > arr[j]) {
        		int tmp =  arr[i];
        		arr[i] = arr[j];
        		arr[j] = tmp;
      		}
    	}
  	}

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