#include<stdio.h>
signed main(){
    int n,m;
    scanf("%d %d",&n,&m);
    int i,x[100],sum=0;
    for(i=0;i<n;i++){
        scanf("%d",&x[i]);
        sum+=x[i];
    }
    int high,j,temp;
    for(i=0;i<n;i++){
        high=i;
        for(j=i+1;j<n;j++){
            if(x[j]>x[high]){
                high=j;
            }
        }
        if(high!=i){
            temp=x[i];
            x[i]=x[high];
            x[high]=temp;
        }
    }
    for(i=0;i<m;i++){
        if(x[i]<(sum/(4*m))){
            printf("No\n");
            return(0);
        }
    }
    printf("Yes\n");
    return(0);
}