#include<stdio.h>

int main(void){
    int n,m;
    scanf("%d %d",&n,&m);
    int a[n];
    for(int i = 0;i < n;i++)scanf("%d",&a[i]);
    int sum = 0;
    int cnt = 0;
    for(int i = 0;i < n;i++)sum += a[i];
    for(int i = 0;i < n;i++)if(a[i] * 4 * m >= sum)cnt++;
    puts(cnt>=m?"Yes":"No");
    return 0;
}
