#include<stdio.h> 
#define MAX 100001

int Partition(int A[],int p,int r){
  int i,j,s,t,u;
  s=A[r];
  i=p-1;
  for(j=p;j<=r-1;j++){
    if(A[j]<=s){
      i++;
      t=A[i];        /*Exchange A[i] and A[j]*/
      A[i]=A[j];
      A[j]=t;
    }
  }
  u=A[i+1];          /*Exchange A[i+1] and A[r]*/
  A[i+1]=A[r];
  A[r]=u;
  return i+1;
}

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