#include<stdio.h>
 
int main(void){
  int N,M=0;
  int sum = 0;
  int dif = 0;
  int tmp = 0;

  scanf("%d",&N);
  scanf("%d",&M);

  int a[N];
  
  for(int i=0; i<N ; i++){
   scanf("%d",&a[i]);
   sum += a[i];
}

  for (int i=0; i<N; ++i) {
    for (int j=i+1; j<N; ++j) {
      if (a[i] < a[j]) {
        tmp =  a[i];
        a[i] = a[j];
        a[j] = tmp;
      }
    }
  }


  dif = sum / (4 * M);

  if(a[M] > dif){
    printf("Yes");
}
  else{
    printf("No");
}

return 0;
 
}