#include<stdio.h>

int main(void)
{
    int n,m;
    int total=0;
    int ans=0;
    
    scanf("%d %d",&n,&m);
    // printf("%d %d",n,m);

    int  a[n];
    for (int i=0;i<n;i++){
        scanf("%d",&a[i]);
        // printf("%d\n",a[i]);
        total=total+a[i];
    }
    // printf("total=%d\n",total);
    // printf("基準=%d\n",total*1/(4*m));

    for (int i=0;i<n;i++){
        if (a[i]>=total*1/(4*m))
            ans=ans+1;
            // flag=1;   
    }

    // printf("ans=%d\n",ans);
    if (ans>=m)
        printf("Yes\n");
    else
        printf("No\n");

   
    return 0;
}