#include<stdio.h>

int partition(int A[],int p,int r){
  int x,i,j,key;

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

  j = i+1;
    
  for(i=0;i<r;i++){
    if(i==j)printf("[%d] ",A[i]);
    else printf("%d ",A[i]);
  }printf("%d\n",A[i]);
  
}

int main(){
  int A[100000],i,j,n;
  
  scanf("%d",&n);
  for(i=0;i<n;i++)scanf("%d",&A[i]);

  partition(A,0,n-1);
   
  return 0;
}