#include<stdio.h>
int main()
{
    int i,j,m,n,temp,a[1000],x,sum=0;
    scanf("%d%d",&n,&m);
     for(i=0;i<n;i++){
        scanf("%d",&a[i]);
        sum=sum+a[i];
     }
//printf("sum=%d\n",sum);
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            if(a[j]>a[j+1]){
                temp=a[j];
                a[j]=a[j+1];
                a[j+1]=temp;
            }
        }
    }
    //for(i=0;i<n;i++){
    //printf("%d\n",a[i]);}
    x=sum/(4*m);
    //printf("x=%d\n",x);
    temp=0;
    for(i=n-1;i>n-1-m;i--){
        if(a[i]>x){temp++;}
    }
    //printf("temp=%d",temp);
    if(temp==m){printf("Yes");}
    else{printf("No");}
    return 0;

}
