#include<stdio.h>
#define MAX 100000

int partition(int *, int, int);

int A[MAX];
int n;

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

  
  q = partition(&A[0], 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 i, j;
  int x, tmp;
  x = A[r];

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

