#include<stdio.h>

int partition(int *,int,int);

int main(){

  int i,A[100000],n,m;

  scanf("%d",&n);

  for(i=0;i<n;i++){

    scanf("%d",&A[i]);

  }

  m=partition(A,0,n-1);

  for(i=0;i<n;i++){

    if(i==n-1) printf("%d\n",A[i]);
    else if(i==m) printf("[%d] ",A[i]);
    else printf("%d ",A[i]);

  }
  
  return 0;

}

int partition(int *A,int p,int r){

  int i,j,kari,x;
  
  x=A[r];
  i=p-1;

  for(j=p;j<r;j++){

    if(A[j]<=x){
      i++;
      kari=A[i];
      A[i]=A[j];
      A[j]=kari;
      
    }
  }

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



  
  