#include<stdio.h>
#include<math.h>
int main()
{
    int i,j,m,n,a[1002],y=0; double sum=0;
    scanf("%d%d",&n,&m);
     for(i=0;i<n;i++){
        scanf("%d",&a[i]);
        sum=sum+a[i];
     }
    /*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;
            }
        }
    }*/
    //sorting
    double x=ceil(sum/(4.0*m));
    for(i=0;i<n;i++){
        if(a[i]>=x){y++;}
    }
    /*for(i=n-1;a[i]>=x;i--){
        if(a[i]>=x){y++;}
    }*/
    if(y>=m){printf("Yes");}
    else{printf("No");}
    return 0;
}
