#include<stdio.h>

int partition(int*,int,int);

int partition(int *A,int p,int r)
{
  int x,y,i,j; /* yは交換用 */

  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;
    }
  }

  y = A[i+1];
  A[i+1] = A[r];
  A[r] = y;

  return i+1;
}

int main()
{
  int i,n,a;
  int A[100000];

  scanf("%d",&n);

  for(i=0;i<n;i++)
    scanf("%d",&A[i]);

  a = partition(A,0,n-1);

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

  return 0;
}

