#include <stdio.h>

#define MAX 100000

int partition(int *,int,int);

int main()
{
  int i, n, kijun;
  int A[MAX];

  scanf("%d",&n);

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

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

int partition(int *A, int p, int r)
{
  int i, j, x, tmp;
  
  x = A[r];
  i = p - 1;
  for(j = p; j < r; j++) {
    if(A[j] <= x) {
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  }
  tmp = A[i+1];
  A[i+1] = A[r];
  A[r] = tmp;

  return i+1;
}

