#include<stdio.h>
signed main(){
    int i,sum=0,c=0,a[10000],m,n;
    scanf("%d %d",&n,&m);
    for(i=0;i<n;i++){
        scanf("%d",&a[i]);
        sum+=a[i];
    }
    int line=sum/(4*m);
    for(i=0;i<n;i++){
        if(a[i]>=line){
            c++;
        }
    }
    if(c>=m){
        printf("Yes\n");
    }else{
        printf("No\n");
    }
    return(0);