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