using System;

public class Program

{

    public static void Main()

    {

int num_of_cards,Containers=0,Boxes,Envelopes;

Console.WriteLine("The number of cards");

num_of_cards=int.Parse(Console.ReadLine());

Containers=num_of_cards/(int)Math.Pow(49,2);

Boxes=(num_of_cards%(int)Math.Pow(49,2))/49;

Envelopes=((num_of_cards%(int)Math.Pow(49,2))-(Boxes*49))/7;

Console.WriteLine("Containers=>{0}, boxes=>{1} , Envelpes=>{2}", Containers,Boxes,Envelopes);

    }

​

}