#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] = A[i];
    }
  }
  t = A[i + 1] ; A[i + 1] = A[r]; A[r] = t;
  return i + 1;
}
 
int main() {
  int i, q;
  scanf_s("%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;
}