#include<stdio.h>

int main(void){
    int n,m,am;
    int a[n];
    scanf("%d %d",&n,&m);
    for(int i=0;i<=n-1;i++){
        scanf("%d",&a[i]);
        am+=a[i];
    }
    int cou;
    for(int i=1;i<=n;i++){
        if(a[i]>am/(4*m)){
            cou++;
        }
    }
    if(cou>=m){
        printf("Yes");
    }else{
        printf("No");
    }
    return 0;
}