#include <stdio.h>
#define MAX 100000

int partition(int *, int, int);

int main() {
  int i, n, q;
  int 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 != q ) printf("%d", A[i]);
    else printf("[%d]", A[i]);

    if ( i < n - 1 ) printf(" ");
  }
  printf("\n");

  return 0;
}

int partition(int *A, int p, int r) {
  int x, i, j, temp;

  x = A[r];
  i = p - 1;

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