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