aplusbi

#include<iostream>
#include<fstream>
#include<iterator>
#include<algorithm>
#include<numeric>
#include<vector>
#include<string>
using namespace std;

struct Line

aplusbi

type tree = Node of tree * int * tree | Nil

open Printf
let rec print_tree t =
    match t with
        | Node (left, data, right) -> print_tree left;
            printf "%d\n" data;
            print_tree right
        | Nil -> ();;