using System;

using System.Collections.Generic;

using System.Text;

public class Program

{

    public static void Main()

    {

        SetOfStacks set = new SetOfStacks();

        for (int i = 1; i <= 7; i++)

        {

            set.Push(i);

        }

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

        set.Pop();

        set.Pop();

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

        set.Pop();

        set.Pop();

        set.Pop();

        set.Pop();

        set.Pop();

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

        for (int i = 1; i <= 30; i++)

        {

            set.Push(i);

        }

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

        for (int i = 1; i <= 32; i++)

        {

            set.Pop();

        }

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

        for (int i = 1; i <= 50; i++)

        {

            set.Push(i);

        }

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

        for (int i = 1; i <= 32; i++)

        {

            set.Pop();

        }

        Console.WriteLine("Current Stack: {0}\nValues: {1}\n", set.Count, set.Print());

    }

}

​

public class SetOfStacks

{

    const int Limit = 10;

    private Stack<Stack<int>> stackSet;     

    public SetOfStacks()

    {

        stackSet = new Stack<Stack<int>>();                     

    }

    public int Count

    {

        get

        {

            return stackSet.Count;

        }

    }

    public void Push(int val)

    {

        if (stackSet.Count == 0 || stackSet.Peek().Count == 10)

        {

            //The stack has reached its limit so we'll add it to the set.           

            //New up a new stack.

            stackSet.Push(new Stack<int>());

        }

        stackSet.Peek().Push(val);      

    }

    public int Pop()

    {

        int value = -1;

        if (stackSet.Count > 0)

        {

            if (stackSet.Peek().Count > 0)

            {

                value = stackSet.Peek().Pop();

            }

            else

            {

                //The current stack is empty. Move to the next one.

                stackSet.Pop();

                value = Pop();

            }

        }

        return value;

    }

    public string Print()

    {

        StringBuilder sb = new StringBuilder();

        string formatter = " | ";

        foreach(var s in stackSet)

        {

            foreach(var i in s)

            {

                sb.Append(i + formatter);

            }

        }

        if (sb.Length > 0)

            sb.Length -= formatter.Length;

        else

            sb.Append("[Empty Stack]");

        return sb.ToString();

    }

}