#include <stdio.h>

#define MAX 1000000

int partition(int *, int, int);

int main(){

  int n, i, j, A[MAX];

  scanf("%d", &n);

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

  printf("\n");
  
  return 0;
}

int partition(int *A, int p, int r){

  int i, j, x, y;

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