#include <stdio.h>
#define MAX 100001

int partition(int A[],int p, int r){

  int x,i,j,rep;
x=A[r];
i=p-1;

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

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

  return i+1;
}

int main(){

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

  scanf("%d",&n);

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

  t=partition(A,0,n-1);

  for(i=0;i<n;i++){
    if(i==t){
      printf("[%d]",A[i]);
    }
      else printf("%d",A[i]);

    if(i<n-1){
      printf(" ");
    }

  }
  printf("\n");


  return 0;
}



/*1 partition(A, p, r)
  2   x = A[r]
  3   i = p-1
  4   for j = p to r-1
  4     if A[j] <= x
  5       i = i+1
  6       A[i] と A[j] を交換
  7   A[i+1] と A[r] を交換
  8   return i+1            */
