#include <stdio.h>
#define MAX 100000

int partition( int A[], int p, int r);

int A[MAX];
int n;




int main()
{

  int i;
  int hen;

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

  hen = partition( A, 0, n-1);

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

  printf("\n");
  
  return 0;
}


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

