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