#include <stdio.h>

#define MAX 100000

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

int main(){
  int i,n,q,A[MAX];

  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 < n-1 && i != q) printf("%d ",A[i]);
    else if(i < n-1 && i == q) printf("[%d] ",A[i]);
    else if(i == n-1) printf("%d\n",A[i]);

  return 0;
}

int partition(int A[MAX],int p,int r){
  int i,j,x,tmp,tmp2;
  x = A[r];
  i = p - 1;
  for(j=p; j<r; j++)
    if(A[j] <= x){
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  tmp2 = A[i+1];
  A[i+1] = A[r];
  A[r] = tmp2;

  return i+1;
}
  

