#include<stdio.h>

int partition(int *, int,int);

int main(){
  int i,n,A[100000],par;

  scanf("%d",&n);

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

  par=partition(A,0,i-1);

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

  printf("%d\n",A[i]);

  return 0;
}
	 
int partition(int * A, int p,int r){
  int x,i,j,a;
  x=A[r];
  i=p-1;
  for(j=p;j<r;j++){
    if (A[j] <= x){
      i = i+1;
      a=A[i];
      A[i]=A[j];
      A[j]=a;
    }
  }

  a=A[i+1];
  A[i+1]=A[r];
  A[r]=a;
    
  return i+1;
}

