#include<stdio.h>
#define N (int)1e5

int partition(int[], int, int);

int main()
{
  int i,j;
  int n;
  int A[N+1];

  scanf("%d",&n);

  for(i = 0;i < n;i++){
    scanf("%d",&A[i]);
  }
  
  j = partition(A, 0, n-1);

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

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

