#include<stdio.h>

#define N 100000

int partition(int, int);

int A[N];

int main(){
  int n,q,i;

  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 > 0) printf(" ");
    if(i == q) printf("[%d]",A[i]);
    else printf("%d",A[i]);
  }
  printf("\n");

  return 0;
}

int partition(int p, int r){
  int x, i, j, k;

  x = A[r];
  i = p-1;

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

  k = A[i+1];
  A[i+1] = A[r];
  A[r] = k;

  return i+1;
}