#include<stdio.h>
int main(void){
    int i,n,m,a[100]={0},c=0,s=0;
    scanf("%d",&n);
    scanf("%d",&m);
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
        s+=a[i];
    }
    for(i=0;i<n;i++){
        if(a[i]>=(double)s/(4*m)){
            c++;
        }
    }
    if(c>=m){
        printf("Yes\n");
    }else{
        printf("No\n");
    }
    return 0;
}