#include<stdio.h>

int main(void){
    int n,m,i,j,sum=0,temp;
    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++){
        for(j=n-1;j>i;j--){
            if(a[j]>a[j-1]){
                temp=a[j];
                a[j]=a[j-1];
                a[j-1]=temp;
            }
        }
    }
    if(a[m-1]>=sum/(4*m)){
        printf("Yes");
    }
    else
    {
        printf("No");
    }
    
}