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

int partition(int *A,int p,int r);

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

  scanf("%d", &n);

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

  for ( i = 0; i < n; i++ ){
    scanf("%d", &A[i]);
  }
  
  q = partition(A,0,n-1);

  for ( i = 0; i < n; i++ ){
    if(i==q){
      printf("[%d] ",A[i]);
      continue;
    }
    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,j,a;  
  x = A[r];
 
  i = p-1;
  for (j = p; j <= r-1; j++){
  
    if (A[j] <= x){

      i = i+1;

      a = A[i];
      A[i] = A[j];
      A[j] = a;
    }
  }
  a = A[i+1];
  A[i+1] = A[r];
  A[r] = a;
  return i+1;
}