#include<stdio.h>
int main(){
    int n, m;
    scanf("%d %d", &n, &m);
    int a[n];
    int total=0, qtd=0;

    for (int i=0; i<n; ++i){
        scanf("%d", &a[i]);
        total+=a[i];
    }
    total=total/(4*m);
    for (int j=0; j<n; ++j){
        if (a[j]>=total)
            qtd+=1;
    }
    if (qtd>=m)
        printf("Yes\n");
    else
        printf("No\n");
    return 0;
}
