#include<stdio.h>

#define MAX 100000

int partition(int*,int,int);

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

  scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
  
  key=partition(A,0,n-1);

  for(i=0;i<n;i++){
    if(i>=1)printf(" ");

    if(i==key)
      printf("[%d]",A[i]);
    else
      printf("%d",A[i]);
  }

  printf("\n");
  return 0;
}
int partition(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=i+1;
      tmp=A[i];
      A[i]=A[j];
      A[j]=tmp;
    }
  }
  tmp=A[i+1];
  A[i+1]=A[j];
  A[j]=tmp;

  return i+1;
}