#include <stdio.h>
int main(void){
    // Your code here!
    int n,i,m,not=0;
    double a[100000],b=0;

    scanf("%d %d", &n, &m);
    if(n >= m){
        for(i=0;i<n;i++){
            scanf("%lf", &a[i]);
            b += a[i];
        }

        for(i=0;i<n;i++){
            if(a[i] < (b/(4*m))){
                not++;
            }
        }
        if(n-not < m){
            printf("No\n");
        }
        else{
            printf("Yes\n");
        }
    }
    else{
        printf("No\n");
    }
    return 0;
}