#include<stdio.h>
#include<stdlib.h>

int partition(int *,int ,int);

int main() {
  int i,n,r,index;
  int *A;

  scanf("%d",&n);
  A = (int *)malloc(n * sizeof(int ));
  for(i=0 ; i<n ; i++) scanf("%d",&A[i]);

  index = partition(A,0,n-1);

  for(i=0 ; i<n ; i++){
    if(i == index){
      if(i != n-1)printf("[%d] ",A[i]);
      else printf("[%d]\n",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=-1,j,temp;
  x = A[r];

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

  return i+1;
}