#include <stdio.h>
#include <stdlib.h>

int partition(int *, int, int);
void swap(int *, int, int);

int main(){
  int i, q, n;
  int *A;

  scanf("%d", &n);

  A = malloc(sizeof(int) * n);

  for(i=0; i<n; i++){
    scanf("%d", &A[i]);
  }
  
  q = partition(A, 0, n-1);

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

  return 0;
}

int partition(int *A, int p, int r){
  int x, i, j;

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

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

  return i+1;
}

void swap(int *A, int i, int j){
  int temp;

  temp = A[i];
  A[i] = A[j];
  A[j] = temp;

}