using System;           

using System.Collections.Generic;

using System.Linq;

​

class Recipe

{

    public string Name { get; set; }

}

​

class Ingredient {

    public string Name { get; set; }

}

​

class User {

    public string Name { get; set; }

}

​

class User_ing

{

    public User user { get; set; }

    public Ingredient ing { get; set; }

    public int quantity { get; set; }

}

​

class Recipe_ing {

    public Recipe recipe { get; set; }

    public Ingredient ing { get; set; }

    public int quantity { get; set; }

}

​

​

​

​

public class Program

{

    public static void Main()

    {

        User shai = new User { Name = "Gidon" };

        User ali = new User { Name = "ניסיתי ככה" };

        Recipe pasta = new Recipe { Name = "pasta" };

        Recipe pizza = new Recipe { Name = "pizza" };

        Recipe burger = new Recipe { Name = "burger" };

        Ingredient noodles = new Ingredient { Name = "noodles" };

        Ingredient cheese = new Ingredient { Name = "cheese" };

        Ingredient pepperoni = new Ingredient { Name = "cow #743875287" };

        Ingredient buns = new Ingredient { Name = "buns" };

        Ingredient sheep = new Ingredient { Name = "sheep" };

        List<User_ing> user_ingredients = new List<User_ing> {

            new User_ing { user = ali, ing = cheese, quantity = 1 },

            new User_ing { user = ali, ing = pepperoni, quantity = 1 },

            new User_ing { user = ali, ing = noodles, quantity = 1 },

            new User_ing { user = ali, ing = sheep, quantity = 1 },

            new User_ing { user = ali, ing = buns, quantity = 1 }

        };

        List<Recipe_ing> recipe_ingredients = new List<Recipe_ing> { 

            new Recipe_ing { recipe = pasta, ing = noodles, quantity = 1 },

            new Recipe_ing { recipe = pizza, ing = cheese, quantity = 1 },

            new Recipe_ing { recipe = pizza, ing = pepperoni, quantity = 1 },

            new Recipe_ing { recipe = burger, ing = buns, quantity = 3 },

            new Recipe_ing { recipe = burger, ing = sheep, quantity = 1 }

        };

        List<Recipe> recipes = new List<Recipe> { pasta, pizza, burger };

​

        var ali_ingredients = user_ingredients.Where(ui => ui.user == ali);

        var ali_potential_recipes = recipes.Where(

            r => !recipe_ingredients.Any(ri => 

                ri.recipe == r && 

                !ali_ingredients.Any(ui => ui.ing.Name == ri.ing.Name && ui.quantity >= ri.quantity)

            )

        ).Distinct();

        Console.WriteLine("Ali's potential recipes:\n");

​

        foreach (var obj in ali_potential_recipes)

        {

            Console.WriteLine(

                "{0}",

                obj.Name);

        }

    }

}