#include<bits/stdc++.h>
 
using namespace std;
int main(){
    int n,m;
    cin>>n>>m;
    int a[n],i,s=0;
    for(i=0;i<n;i++){
        cin>>a[i];
        s+=a[i];
    }
    int k=0;
    for(i=0;i<n;i++)
        if(a[i]>=((.25*s)/m)) k++;
        
    if(k>=m) cout<<"Yes";
    else cout<<"No";
}