#include<stdio.h>
#include<stdlib.h>
 
int partition(int *, int, int);
 
int main(){
 
  int n,r,i,*A,p;
 
  scanf("%d",&n);
 
  A = malloc(sizeof(int)*n); 
 
  for(i = 0 ; i < n ; i++)
    scanf("%d",&A[i]);
 
  p = partition(A, 0, n-1);
 
  for(i = 0 ; i < n ; i++){
    if(i == p) printf("[%d] ",A[i]);
    else if(i == n-1) printf("%d\n",A[i]);
    else printf("%d ",A[i]);
  }
 
  return 0;
 
}
 
 
int partition(int *A, int p, int r){
 
  int x,i,j,tmp;
 
  x = A[r];
  i = p;
 
  for(j = p ; j <= r-1 ; j++){
    if(A[j] <= x){
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
      i++;
    }
  }
    tmp = A[i];
    A[i] = A[r];
    A[r] = tmp;
 
    return i;
 
}