#include<stdio.h>

int main(){

    int i,j;
    int n,m;
    int a[1000];
    int std;
    int count = 0;
    int total =0 ;

    //----input----
    scanf("%d %d", &n, &m);

    for(i=0;i<n;i++){
        scanf("%d", &a[i]);
        total += a[i];
    }
    
    //----mainFunction----
    
    std = total / 4 * m;

    for(i=0;i<n;i++){
        if(std > a[i]){
            count++;
        }
    }

    //----output----
    if(count >= m){
        printf("Yes\n");
    } else {
        printf("No\n");
    }

    return 0;

}
