#include<stdio.h>

int main(void){
	int N, M;
	scanf("%d %d", &N, &M);
	int A[1000];
	int count = 0;
	for(int i = 0; i < N; i++){
		scanf("%d", &A[i]);
		count += A[i];
	}
	int limit = count / (4 * M);
	int num = 0;
	for(int i = 0; i < N; i++){
		if(A[i] >= limit) num++;
	}
	
	if(num >= M) printf("Yes");
	else printf("No");
}