#include<stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#define N 200001
#define MAX 100000
int A[MAX], n;

int partition(int p, int r) {
  int x, m, i, j;
    i = p-1;
  x = A[r];

  for ( j = p; j < r; j++ ) {
    if ( A[j] <= x ) {
      i++;
      m = A[i];
      A[i] = A[j];
      A[j] = m;
    }
  }
 m = A[i + 1];
 A[i + 1] = A[r];
 A[r] = m;
  return i + 1;
}

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

