#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[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("[");
    pritnf("%d",A[i]);
    if(i==q)printf("");
  }
  printf("\n");

  return 0;
}

