#include<stdio.h>
int main(void){
    int n,m;
    scanf("%d %d",&n,&m);
    int a[n];
    int i,j;
    int temp;
    int sum;
    int mm;
    int p;
    int count;
    for(i=0;i<n;++i){
        scanf("%d",&a[i]);
    }
    sum=0;
    for(i=0;i<n;++i){
        sum=sum+a[i];
    }
    p=0;
    mm=0;
    mm=4*m;
    p=sum/mm;
    count=0;
    for(i=0;i<n;++i){
        for(j=n-1;j>i;--j){
            if(a[i]<a[j]){
                temp=a[i];
                a[i]=a[j];
                a[j]=temp;
            }
        }
    }
    for(i=0;i<m;++i){
        if(a[i]<p){
            printf("No\n");
            return 0;
        }
    }
    printf("Yes\n");
    return 0;
}