#include<stdio.h>
int main(void){
    int n,m,a[100],i,sum = 0,count = 0;

    scanf("%d%d",&n,&m);
    for(i=0;i<n;i++)
        scanf("%d",&a[i]);

    for(i=0;i<n;i++)
        sum = sum + a[i];

    for(i=0;i<n;i++){
        if(a[i]>=sum/4/m)
            count = count + 1;
    }

    if(count >= m)
        printf("Yes\n");
    else
        printf("No\n");

    return 0;
}