#include <stdio.h>
#include <stdlib.h>
#define MAX 100000
int A[MAX],n;
int partition(int, int);
int main(){
  int i,q;
  scanf("%d",&n);
  if(n < 1 || n > 100000)
    exit(1);
  for(i = 0; i < n; i++){
    scanf("%d",&A[i]);
    if(A[i] < 0 || A[i] > 100000)
      exit(1);
  }

  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;
}

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;
}

