
#include<stdio.h>
#define N 100000

int partition(int*,int,int);

int main(){
  int num,n[N],i,center;

  scanf("%d",&num);

  for(i=0; i<num; i++) scanf("%d",&n[i]);
  
  center = partition(n,0,num-1);
    
    for(i=0; i<num-1; i++){
      if(i!=0) printf(" ");
      if(i==center){
	printf("[%d]",n[i]);
	continue;
      }
      printf("%d",n[i]);
    }
    printf("%d\n",n[i]);
  
  return 0;
}

int partition(int *A,int p,int r){
  int x,tmp,i,j;
  x = A[r];
  i = p-1;
  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;
}