#include <stdio.h>

int main()
{
  int N, M;
  int sum = 0;
  int count = 0;
  scanf("%d", &N);
  scanf("%d", &M);
  int A[N+1];
  for(int i = 0; i < N; i++){
    scanf("%d", &A[i]);
    sum += A[i];
  }
  for(int i = 0; i < N; i++){
    if(A[i] > sum/(4*M)){
      count += 1;
    }
  }
  if(count >= M){
    printf("Yes\n");
  }
  else{
    printf("No\n");
  }

  return 0;
}