#include <stdio.h>

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