#include <stdio.h>
int main(){
 int N,M,i;
 scanf("%d %d",&N,&M);
 int A[N];
 int cnt=0;
 double sum=0.0;
 for(i=0;i<N;i++){
 scanf("%d",&A[i]);
 sum+=A[i];
 }
 for(i=0;i<N;i++){
 if(sum/(4*M)<=A[i])cnt++;
 }
 if(cnt>=M)printf("Yes");
  else printf("No");
 return 0;
}