#include<stdio.h>

#define MAX 100000


int partition(int A[], 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 A[MAX], i, q, n;

  scanf("%d", &n);
  for( i = 0 ; i < n ; i++){
    scanf("%d", &A[i]);
  }
  q = partition(A, 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;
}

