#include<stdio.h>
#define N 1000000

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

int main(){
  int i,k,n,a[N];
  scanf("%d",&n);
 
  for(i=0;i<n;i++)scanf("%d",&a[i]);
  k=Partition(a,0,n-1);
  for(i=0;i<n;i++){
    if(i!=n-1){
      if(i!=k)printf("%d ",a[i]);
      else printf("[%d] ",a[i]);
    }
    else printf("%d\n",a[i]);
  }
  
  
  
  return 0;
}