#include<stdio.h>
#include<stdlib.h>
#define N 100000

int Partition(int *A,int p,int r)
{
  int x,i,j,swp;

  x=A[r];
  i=p-1;

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

  return i+1;
}
int main(){

  int n,i,p=0;
  int A[N];

  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  p=Partition(&A[0],0,n-1);
  printf("%d",A[0]);
  
  for(i=1;i<n;i++){
    if(i==p){
      printf(" ");
      printf("[%d]",A[i]);
    }else{
      printf(" ");
      printf("%d",A[i]);
    }
  }
    printf("\n");
    return 0;
  }