#include<stdio.h>
int main(){
  int unused __attribute__((unused));
  int i, N, M, sum = 0, cnt = 0;
  int A[1000];

  unused = scanf("%d %d", &N, &M);
  for(i=0; i<N; i++){
    unused = scanf("%d", &A[i]);
    sum += A[i];
  }

  for(i=0; i<N; i++){
    if(A[i] >= sum/(4*M)) cnt++;
  }
  if(cnt >= M) printf("Yes");
  else printf("No");
  
  return 0;
}