Parent Array Relation | C# Online Compiler

Parent Array Relation by Rashed Riad

using System;
using System.Collections.Generic;

public class Node
{
	public int id;
	public Node left, right;
	public Node(int id)
	{
		this.id=id;
		left=right=null;
	}
}
public class Program
{
	public Node build(int[] ar)
	{
		Dictionary<int, Node> mp = new Dictionary<int, Node>();
		for(int i=0; i<ar.Length; i++)
		{
			Node tmp = new Node(i);
			mp.Add(i, tmp);
		}
		Node root = new Node(0);
		for(int i=0;i<ar.Length;i++)
		{
			if(ar[i]==-1)
				root = mp[i];
			else
			{
				Node par = mp[ar[i]];
				if(par.left==null)
					par.left = mp[i];
				else
					par.right = mp[i];
			}	
		}
		return root;	
	}
	void inOrder(Node root)
	{
		if(root==null)return;
		inOrder(root.left);
		Console.Write(root.id+" ");	
		inOrder(root.right);
	}
	public static void Main()
	{
		int[] ar = new int[]{-1, 0, 0, 1, 1, 3, 5};
		Program tree = new Program();
		Node root = tree.build(ar);
		tree.inOrder(root);
	}
}

​x
 
using System;
using System.Collections.Generic;
​
public class Node
{
    public int id;
    public Node left, right;
    public Node(int id)
    {
        this.id=id;
        left=right=null;
    }
}
public class Program
{
    public Node build(int[] ar)
    {
        Dictionary<int, Node> mp = new Dictionary<int, Node>();
        for(int i=0; i<ar.Length; i++)
        {
            Node tmp = new Node(i);
            mp.Add(i, tmp);
        }
        Node root = new Node(0);
        for(int i=0;i<ar.Length;i++)
        {
            if(ar[i]==-1)
                root = mp[i];
            else
            {
                Node par = mp[ar[i]];
                if(par.left==null)
                    par.left = mp[i];
                else
                    par.right = mp[i];
            }   
        }
        return root;    
    }
    void inOrder(Node root)
    {
        if(root==null)return;
        inOrder(root.left);
        Console.Write(root.id+" "); 
        inOrder(root.right);
    }
    public static void Main()
    {
        int[] ar = new int[]{-1, 0, 0, 1, 1, 3, 5};
        Program tree = new Program();
        Node root = tree.build(ar);
        tree.inOrder(root);
    }
}

Compilation error (line 4, col 7): The type or namespace name 'Json' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 36, col 21): The type or namespace name 'JsonSchema' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 51, col 28): The type or namespace name 'JsonSchema' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 22, col 26): The name 'JsonSchema' does not exist in the current context
Compilation error (line 36, col 51): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 37, col 25): The type or namespace name 'Dictionary<,>' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 37, col 44): The type or namespace name 'JsonSchema' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 39, col 28): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 40, col 31): The name 'SchemaValueType' does not exist in the current context
Compilation error (line 43, col 28): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 44, col 31): The name 'SchemaValueType' does not exist in the current context
Compilation error (line 51, col 59): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 52, col 15): The name 'SchemaValueType' does not exist in the current context
Compilation error (line 53, col 17): The name 'MetaSchemas' does not exist in the current context
Compilation error (line 56, col 25): The type or namespace name 'Dictionary<,>' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 56, col 44): The type or namespace name 'JsonSchema' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 59, col 30): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 60, col 23): The name 'SchemaValueType' does not exist in the current context
Compilation error (line 67, col 32): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 68, col 23): The name 'SchemaValueType' does not exist in the current context
Compilation error (line 75, col 31): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 76, col 23): The name 'SchemaValueType' does not exist in the current context
Compilation error (line 78, col 28): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 79, col 25): The type or namespace name 'JsonSchemaBuilder' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 83, col 19): The type or namespace name 'Dictionary<,>' could not be found (are you missing a using directive or an assembly reference?)
Compilation error (line 83, col 38): The type or namespace name 'JsonSchema' could not be found (are you missing a using directive or an assembly reference?)

Last Run:	10:18:09 pm
Compile:	0.007s
Execute:	0s
Memory:	0b
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