#include <stdio.h>
int main()
{
    int a, b;
    int i = 0;
    int sum = 0;
    int A[100];
    scanf("%d %d", &a, &b);
    int j = a;
    while(a>0){
        scanf("%d", &A[i]);
        sum += A[i];
        a--;
        i++;
    }
    int pop=0;
    i = 0;
    while (j > 0)
    {
        if(A[i]>=sum/(4*b)){
            pop++;
        }
        sum += A[i];
        j--;
        i++;
    }
    if(pop>b){
        printf("Yes\n");
    }
    else
    {
        printf("No\n");
    }

}