#include <stdio.h>

int partition(int*, int, int);

int main(){
  int i,j,n,A[100000],a;

  scanf("%d",&n);

  for(i=1;i<=n;i++) scanf("%d",&A[i]);
  i=1;

  a=partition(A, i, n);
  for(i=1;i<a;i++) printf("%d ",A[i]);
  printf("[%d] ",A[a]);
  for(i=a+1;i<n;i++) printf("%d ",A[i]);
  printf("%d\n",A[n]);

  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-1;j++){
    if (A[j] <= x){
      i = i+1;
      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;
}

