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

int partition(int*,int,int);

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

  //input
  
  scanf("%d", &n);

  A = malloc(sizeof(int)*n);

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

  //main

  r = partition(A,0,n-1);
  
  //output
  
  for(i = 0; i < n-1; i++){
    if(i == r){
      printf("[%d] ",A[i]);
    }
    else printf("%d ",A[i]);
  }

  if(i == r){
      printf("[%d]\n",A[i]);
    }
  else printf("%d\n",A[i]);
 
  free(A);
  
  return 0;
}

int partition(int *A,int p,int r){
  int i, j, temp;
  int 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);
}
  

