#include <stdio.h>
#include <stdlib.h>
#define MAX 100000
 
int Partition(int A[] ,int ,int );
int A[MAX];
 
int main(){
 
  int n,c,i,j;
 
  scanf("%d",&n);
 
  for(i=0;i<n;i++) scanf("%d",&A[i]);
 
  c = Partition(A,0,n-1);
 
  for(i=0;i<n;i++){
    if(i!=0) printf(" ");
    if(i==c) printf("[%d]",A[i]);
    else printf("%d",A[i]);
  }
  
  printf("\n");
 
  return 0;
}
int Partition(int A[] ,int p,int r){
 
  int c,tmp,i,j;
 
  c = A[r];
  i = p-1;
 
  for(j=p; j<r; j++){
    if(A[j] <= c){
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp; 
    }
  }
    tmp=A[i+1];
    A[i+1]=A[r];
    A[r]=tmp;
 
    return i+1;
}