#include<stdio.h>

int main(){
    int n,m;
    scanf("%d%d",&n,&m);
    int a[100000];
    int sum=0;
    for(int i=0;i<n;i++){
        scanf("%d",&a[i]);
        sum+=a[i];
    }

    int count=0;
    
    for(int i=0;i<n;i++){
        if((double)a[i]<sum*1.0/(4*(double)m)){
           
        }else{
          count++;
        }
    }

    if(count>=m){
        printf("Yes");
    }else{
        printf("No");
    }

    return 0;
}
