#include<stdio.h>

#define MAX 100000

int Paritition(int *,int,int);

int main(){
  int i,j,n,index;
  int A[MAX];

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

  index=Paritition(A,0,n-1);

  for(i=0;i<index;i++) printf("%d ",A[i]);
  printf("[%d] ",A[index]);
  for(i=index+1;i<n-1;i++) printf("%d ",A[i]);
  printf("%d\n",A[i]);
  
  return 0;
}

int Paritition(int *A,int p,int r){
  int i,j,x,tmp;

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

