using System;

using System.Linq;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

                ""People"":[  

                {  

                    ""id"" : ""123"",

                    ""firstName"" : ""Bill"",

                    ""lastName"" : ""Gates"",

                    ""roleIds"" : {

                            ""int"" : [""3"", ""9"", ""1""]

                        }

                },

                {  

                    ""id"" : ""456"",

                    ""firstName"" : ""Steve"",

                    ""lastName"" : ""Jobs"",

                    ""roleIds"" : {

                        ""int"" : [""3"", ""1""]

                    }

                },

                {  

                    ""id"" : ""789"",

                    ""firstName"" : ""Elon"",

                    ""lastName"" : ""Musk"",

                    ""roleIds"" : {

                        ""int"" : [""3"", ""7""]

                    }

                },

                {

                    ""id"" : ""012"",

                    ""firstName"" : ""Agatha"",

                    ""lastName"" : ""Christie"",

                    ""roleIds"" : {

                        ""int"" : ""2""

                    }

                }

            ]}";

        var pplFeed = JObject.Parse(json);

        for (int i = 1; i <= 9; i++)

        {

            DumpUsersWithRoleId(pplFeed, i.ToString());

        }

    }

    private static void DumpUsersWithRoleId(JObject pplFeed, string roleId)

    {

        var resAnAssocInfo = pplFeed["People"]

            .Where(p => p["roleIds"]["int"].Children().Contains(roleId) || p["roleIds"]["int"].ToString() == roleId)

            .Select(p => new

                    {

                        id = (string)p["id"],

                        FName = (string)p["firstName"],

                        LName = (string)p["lastName"]

                    }).ToList();

        Console.WriteLine("People with role id " + roleId + ":");

        if (resAnAssocInfo.Count > 0)

        {

            foreach (var item in resAnAssocInfo)

            {

                Console.WriteLine(item.FName + " " + item.LName + " (" + item.id + ")");

            }

        }

        else

        {

            Console.WriteLine("none");

        }

        Console.WriteLine();

    }

}