#include <stdio.h>
#define N 100000

int A[N],n;

int partition(int p,int r){
  int x,i,j,temp;

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

  }

  temp=A[i+1];
  A[i+1]=A[r];
  A[r]=temp;
  return i+1;
  
}

int main(void)
{
  int i,p;
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&A[i]);
  p=partition(0,n-1);

  for(i=0;i<n;i++){
    if(i)printf(" ");
    if(i==p)printf("[%d]",A[i]);
    else printf("%d",A[i]);
    

  }
  printf("\n");
  return 0;
  
}


