#include <stdio.h>
int main(void)
{
    int m,n,i,a[101],st,cou;
    double je;
    
    scanf("%d%d",&n,&m);
    
    st = 0;
    cou = 0;
    for(i=1;i<=n;i++){        
        scanf("%d",&a[i]);
        st += a[i];
    }
    
    je = (double)st * (1 / (4*(double)m));
    for(i=1;i<=n;i++){
        if(a[i] >= je)
          cou++;
    }
    
    if(cou >= m)
        printf("Yes\n");
    else
        printf("No\n");
    return 0;
}