/* B - Popular Vote */

#include <stdio.h>

int main(void){
  int N, M, i, A[100], sum = 0, count = 0;
  scanf("%d %d", &N, &M);
  for(i = 0; i < N; i++){
    scanf("%d", &A[i]);
    sum += A[i];
  }
  for(i = 0; i < N; i++){
    if(sum % (4 * M) == 0){
      if(A[i] >= sum / (4 * M)){
        count++;
      }
    }else{
      if(A[i] >= sum / (4 * M) + 1){
        count++;
      }
    }
  }
  if(count >= M){
    printf("Yes\n");
  }else{
    printf("No\n");
  }
}
