#include <stdio.h>
#include <string.h>

int main(){

	int  i,j;
	int 	x,y,a,b,c;
	int N,M,A[110];
	long long sum=0;
	scanf("%d%d",&N,&M);
	
	if(N==1){
		printf("Yes\n");
		return 0;
	}
	for(i=0;i<N;i++){
		scanf("%d",A+i);
		sum +=(long long)A[i];
	}
	long long gt  = sum/(long long)(4*M)+1;
	int cnt =0;
	for(i=0;i<N;i++){
		if(A[i]<gt){}
		else{
			cnt++;
		}
	}
	
	if(cnt>=M)printf("Yes\n");
	else	printf("No\n");
 return 0;
 }