
#include <stdio.h>
#define MAX 100000
 
int A[MAX];
int partition();
 
 
int main(){

  int i;
  int n,q;
 
  scanf("%d",&n);

  for( i=0 ; i < n ; i++ ){

    scanf("%d",&A[i]);

  }

  q = partition( 0 , n-1 );
 
  for( i = 0; i < n; i++ ){

    if(i == q) printf("[");
 
      printf( "%d", A[i]);
 
      if(i == q) printf("]");
 
      if(i != n-1) printf(" ");
  }
  printf("\n");
 
  return 0;
}
 
int partition(int p,int r)
{
  int i,j;
  int x;
  int s;
 
  x = A[r];
  i = p-1;

  for(j = p; j < r; j++){

    if(A[j]<= x){

      i++;
      s = A[i];
      A[i] = A[j];
      A[j] = s;
    }
  }
      s = A[i+1];
      A[i+1] = A[r];
      A[r] = s;
  
    return i+1;
  }