#include<stdio.h>

int main(){
	int N, i = 0, M, sel = 0, sum = 0;
	scanf("%d %d", &N, &M);
	int a[N];
	for(i = 0; i < N; i++){	
		scanf("%d", &(a[i]));
		sum+=a[i];
	}
	for(i = 0; i < N; i++){	
		if( sum / (4*M) <= a[i]) sel++;
	}
	if(sel > M){
		printf("Yes\n");
	}else{
		printf("No\n");
	}
	return 0;
}