#include <stdio.h>
#define MAX 100000

int A[MAX],n;

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

int main(){
  int i,q;

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

  q = partition(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;
}

