#include <stdio.h>
#define MAX 100000

int partition(int [],int , int);
int main(){
  int A[MAX],n,i,same;
    scanf("%d",&n);
  for(i=0;i<n;i++){
    scanf("%d",&A[i]);
  }
    same=partition(A,0,n-1);
    for(i=0;i<n;i++){
      if(i==same){
        printf("[%d] ",A[same]);
        continue;
      }
      if(i==n-1  )printf("%d\n",A[i]);
      else printf("%d ",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[j];
      A[j]=A[i];
      A[i]=a;
    }
  }
    a=A[i+1];
    A[i+1]=A[r];
    A[r]=a;

    return i+1;
}
