#include <stdio.h>
#define AMAX 100000

int partition(int*, int, int);
int main(){

  int i,n,A[AMAX],b;

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

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

int partition(int* A, int p, int r){
  int tmp1,tmp2,x,i,j;
  
  x = A[r];
  i = p-1;
  for(j=p;j<r;j++){
    if(A[j]<=x){
      i = i+1;
      tmp1=A[j];
      A[j]=A[i];
      A[i]=tmp1;
    }
  }
  tmp2=A[i+1];
  A[i+1]=A[r];
  A[r]= tmp2;
  
  return i+1;
}


      

