#include <stdio.h>
#define MAX 100000

int A[MAX],n;

int partition(int p, int r)
{
  int x,i,j,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 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) printf(" ");
      if(i == q) printf("[");
      printf("%d",A[i]);
      if(i == q) printf("]");
    }
  printf("\n");

  return 0;
}
