#include<stdio.h>

#define N 100001

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

int main(){
  int A[N];
  int n, i, q;
  
  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 if( i!=n-1 ) {
      printf("%d ", A[i]);
    }
    else printf("%d", A[i]);
  }
  printf("\n");
  
  return 0;
}

int Partition( int A[], int p, int r ){
  int i, j, x, y, z;
  
  x = A[r]; 
  i = p-1;

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