#include<stdio.h>
#define MAX 100000
int partition(int,int);
int A[MAX];
int main(){

  int n,i,j,r,p;

  scanf("%d",&n);


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

  p = partition(0,n-1);
  

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

  printf("%d\n",A[n-1]);


  return 0;
}

int partition(int p, int r){

  int i,x,j,change;

  x = A[r];
  i = p-1;

  for(j = p; j < r; j++){
    if(A[j] <= x){
      i = i+1;
      change = A[i];
      A[i] = A[j];
      A[j] = change;
    }
  }
  change = A[i+1];
  A[i+1] = A[r];
  A[r] = change;

  return i+1;
}