#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main() {

    int n, m;
    scanf("%d %d", &n, &m);

    int arr[n];
    int cnt = 0;
    int mysum = 0;
    for (int i = 0; i < n; i++) {
        int a;
        scanf("%d", &a);
        mysum += a;
        arr[i] = a;
    }
    
    double border = (double)mysum / (4 * m);
    
    for (int j = 0; j < n; j++) {
        if(border<=arr[j]){
            cnt++;
        }
        if(cnt>=m){
            printf("Yes");
            return 0;
        }
    }

    printf("No");

    return 0;

}