#include<stdio.h>
#define MAX 100000

int A[MAX],n;

int partition(int,int);

int main(){
  int i,a;

  scanf("%d",&n);

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

  a = partition(0,n -1);

  for(i = 0;i < n;i++){
    if(i > 0){
      printf(" ");
    }
    if(i == a){
      printf("[");
    }
    printf("%d",A[i]);
    if(i == a){
      printf("]");
    }
  }

  printf("\n");

  return 0;
}

int partition(int a,int b){
  int i,j,x,t;

  x = A[b];
  i = a - 1;

  for(j = a;j < b;j++){
    if(A[j] <= x){
      i++;
      t = A[i];
      A[i] = A[j];
      A[j] = t;
    }
  }
  
  t = A[i + 1];
  A[i + 1] = A[b];
  A[b] = t;

  return i + 1;
}

