#include<stdio.h>
#define MAX 100000

int partition(int A[], int n, int p, int r){
  int x, i, j, t;
  x = A[r];
  i = p - 1;
  for ( j = p ; j < r ; j++ ){
    if ( A[j] <= x ){
      i++;
      t = A[i];
      A[i] = A[j];
      A[j] = t;
    }
  }
  t = A[i+1];
  A[i+1] = A[r];
  A[r] = t;

  return i+1;
}

int main(){
  int A[MAX],n,i,k;
  scanf("%d",&n);
  for ( i = 0 ; i < n ; i++ )
    scanf("%d",&A[i]);
  k = partition(A,n,0,n-1);

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

  return 0;
}
