#include<stdio.h>

int partition(int*,int,int);

int main(){
  int i,n,x;

  scanf("%d",&n);

  int A[n];

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

  x=partition(A,0,n-1);
  for(i=0;i<x;i++){
    printf("%d ",A[i]);
  }
  printf("[%d] ",A[i]);
  for(i+=1;i<n-1;i++){
    printf("%d ",A[i]);
  }
  printf("%d\n",A[i]);
  return 0;
}
  
int partition(int *A,int p,int r){
  int x=0,hako=0;
  int i,j;
  x=A[r];
  i=p-1;
  for(j=p;j<r;j++){
    if(A[j]<=x){
      i=i+1;
      hako=A[i];
      A[i]=A[j];
      A[j]=hako;
    }
  }
  hako=A[i+1];
  A[i+1]=A[r];
  A[r]=hako;

  return i+1;
}

