#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX 100000

int partition(int A[], int p, int r)
{
  int n, 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(void)
{
  int i, n, q, A[MAX];

  scanf("%d", &n);

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

  q = partition(A, 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;
}

