#include<stdio.h>
#define N 100000

int partition(int [], int , int ); 

int main(){
  
  int A[N], n, i, q;

  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;
}
int partition(int A[], int p, int r){
  int x, i, j, t;
  
  x = A[r];
  i = p - 1;
  for(j=p;j<=r-1;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;
}