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

int n;

int partition(int [], int, int);
void swap(int *, int *);

int main(){
  int *A;
  int k, i;

  scanf("%d",&n);

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

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

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

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

    if(i<n-1)
      printf(" ");
  }
  printf("\n");
  
  free(A);
  return 0;
}

int partition(int A[], int p, int r){
  int x;
  int i, j;
  
  x = A[r];
  i = p-1;

  for(j=p; j<r; j++){
    if(A[j] <= x){
      i++;
      swap(&A[i], &A[j]);
    }
  }

  swap(&A[i+1], &A[r]);
  return i+1;
}

void swap(int *a, int *b){
  int tmp;

  tmp = *a;
  *a = *b;
  *b = tmp;
}

