#include <stdio.h>

#define MAX 100000

int partition(int, int);

int A[MAX], n;

int main()
{
  int i, q;
  
  scanf("%d", &n);

  for( i = 0 ; i < n ; i++ )
    scanf("%d", &A[i]);

  q = partition(0, n-1);

  for( i = 0 ; i < n ; i++ ){
    if( i > 0 ) printf(" ");
    if( i == q ) printf("[");
    printf("%d", A[i]);
    if( i == q ) printf("]");
  }

  printf("\n");

  return 0;
}

int partition(int p, int 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;
    }
  }
  A[i+1] = A[r];

  return i+1;
}