#include<stdio.h>

#define MAX 100000

int main() {
  int n,i,z,A[MAX];

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

  z = partition(A,n,0,n-1);
  
  for(i = 0 ; i < n ; i++) {
    if(i)
      printf(" ");
    if(i == z)
      printf("[");
    printf("%d",A[i]);
    if(i == z)
      printf("]");
  }
  printf("\n");
  return 0;
}

int partition(int A[], int n, int p, int r) {
  int x,i,j,tmp;

  x = A[r];
  i = p-1;

  for(j = p ; j <= r-1 ; j++) {
    if(A[j] <= x) {
      i++;
      tmp = A[i];
      A[i] = A[j];
      A[j] = tmp;
    }
  }

  tmp = A[i+1];
  A[i+1] = A[r];
  A[r] = tmp;

  return i+1;
}

