#include <stdio.h>

int main()
{
	int N, M;
	scanf("%d %d", &N, &M);
    
    int A[N];
    int i, sum;
    for(i = 0; i < N; i++){
        scanf("%d ", &A[i]);
        sum += A[i];
    }
    
    int count = 0;
	for(i = 0; i < N; i++){
        if((double)A[i] > ((double)sum / (4. * (double)M))){
            count++;
        }
    }

    if(count >= M){
        printf("Yes\n");
    }else{
        printf("No\n");
    }

    //Debug
    //printf("count : %d\n",count);
    //printf("sum : %d\n",sum);

	return 0;
}