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

#define max 100

//qsort(str, n, sizeof(int), up_comp);
int up_comp(const void *a, const void *b){return *(int*)a - *(int*)b;}
int down_comp(const void *a, const void *b){return *(int*)b - *(int*)a;}

int main()
{
    int n, m, a[max], i, sum=0, cnt=0;
    char s[max];
    
    scanf("%d %d", &n, &m);
    for (i=0; i<n; i++) {
        scanf("%d", &a[i]);
    }
    
    for (i=0; i<n; i++) {
        sum=sum+a[i];
    }
    
    qsort(a, n, sizeof(int), down_comp);
    
    for (i=0; i<n; i++) {
        if (a[i]>=sum/(4*m)) {
            cnt++;
        } else {
            break;
        }
    }
    
    if (cnt>=m)
        printf("Yes");
     else
        printf("No");
    
    return 0;
}


