#include <stdio.h>

int main(void){
  int N,M;
  scanf("%d",&N);
  scanf("%d",&M);
  putchar('\n');
  int v[N];
  int count = 0;
  int all = 0;
  for(int i = 0;i < N;i++){
    scanf("%d",&v[i]);
    all += v[i];
  }
  float r = all/(4*M);
  putchar('\n');
  for(int i = 0;i < N;i++){
    if(v[i] >= r){
      count++;
    }
  }
  if(count >= M){
    printf("Yes");
  }
  else{
    printf("No");
  }
return 0;
}
