#include <stdio.h>

#define max 100000

int partition(int *,int,int);

int main(){
  int n,i,p;
  int A[max];

  scanf("%d",&n);

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

  p = partition(A,0,n-1);

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

  A[r] = A[i+1];
  A[i+1] = x;
  
  return i+1;
}

