#include<stdio.h>
#define N 100000

int partition(int*,int,int);


int main(){
  
  int A[N];
  int n, q;
  int i;
  
  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 ) printf(" ");
    if ( i == q ) printf("[");
    printf("%d", A[i]);
    if ( i == q ) printf("]");
    
  }
  printf("\n");

  return 0;
}

int partition(int A[], int p, int r){
  
  int x;
  int i, j;
  int 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;
}