#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;
}
