#include<stdio.h>
#define MAX 100000

int A[MAX], n;

int partition(int p, int r) {
  int x, i, j, t;
  x = A[r];
  i = p -1;
  for ( j = p; j < r; j++ ){
  if ( A[j] <= x ){
         i++;
   t = A[i]; A[i] = A[j]; A[j] = t;
   }
   }
  t = A[i+1]; A[i+1] =A[r]; A[r] = t;
  return i+1;
  }
  
  int main() {
  int i, q;
  
  scanf("%d", &n);
  for (  i = 0; i < n; i++) scanf("%d", &A[i]);
  
  q = partition(0, n-1);
  
  for ( i = 0; i < n; i++ ) {
    if ( i ) printf(" ");
    if ( i == q ) printf("[");
    printf("%d", A[i]);
    if ( i == q ) printf("]");
  }
  printf("\n");
  
  return 0;
  }    
  

