#include<stdio.h>
int main(void){
    int n,m;
    scanf("%d %d",&n,&m);
    int a[n];
    int i;
    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){
        if(a[i]>=p){
            count=count+1;
        }
    }
    if(count>=m){
        printf("Yes\n");
    }else{
        printf("No\n");
    }
    return 0;
}