#include <stdio.h>
#define N 100000

int partition(int,int);

int A[N];		    

int partition(p,r)
{
  int i,j,x,tmp;
  x = A[r];
  i = p-1;
  for(j=p;j<r;j++){
    if(A[j]<=x){
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  }
  tmp = A[i+1];
  A[i+1] = A[r];
  A[r] = tmp;
  
  return i+1;
}

int main()
{
  int n,i,h;
  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  h = partition(0,n-1);
  for(i=0;i<n-1;i++){
    if(i==h) printf("[%d] ",A[i]);
    else printf("%d ",A[i]);
  }
  printf("%d\n",A[i]);
  return 0;
}


