#include<stdio.h>
#define N 100000
 
int partition(int[],int,int);
 
int main(){
  int i,j,n,p;
  int A[N];
 
  scanf("%d",&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!=0){
      printf(" ");
    }
    if(i==p){ 
      printf("[");
    }
      printf("%d",A[i]);
    if(i==p){
      printf("]");
    }
  }

  printf("\n"); 
  return 0;
}
 
int partition(int A[],int p,int r){
  int i,j,x,e;

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