
#include<stdio.h>
#define N 100001
int Partition(int[],int,int);

int main(){

  int A[N],n,i,q;

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

  q = Partition(A,0,n - 1);

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

  return 0;
}

int Partition(int A[],int p,int r){

  int x,i,j,tmp;

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

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

  return i + 1;
}