#include<stdio.h>
#define MAX 100000

int A[MAX],n;

int partition(int, int);

int main()
{
  int i,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 > 0)printf(" ");
    if(i == q)printf("[");
    printf("%d",A[i]);
    if(i == q)
      printf("]");
  }
  printf("\n");
  
  return 0;
}

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

