static void Main(string[] args)
{
Stack<string> books = new Stack<string>();
books.Push("Programming WPF");
books.Push("The Philosophy Book");
books.Push("Heat and Thermodynamics");
books.Push("Harry Potter and the Chamber of Secrets");
Console.WriteLine("ALL BOOKS:");
foreach (string title in books)
{
Console.WriteLine(title);
}
string topItem = books.Pop();
string topItem = books.Peek(); // Allows you to peek at the top item and not remove it
Console.WriteLine("\r\nTOP ITEM IS: " + topItem);
Console.WriteLine("\r\nALL BOOKS:");
foreach (string title in books)
{
Console.WriteLine(title);
}
}
static void Main(string[] args)
{
var parameters = Console.ReadLine().Split().Select(int.Parse).ToArray();
var numberOfPushes = parameters[0];
var numberOfPops = parameters[1];
var numberToFind = parameters[2];
var inputNumbers = Console.ReadLine().Split().Select(int.Parse).ToArray();
var numberStack = new Stack<int>();
for (int i = 0; i < numberOfPushes; i++)
{
numberStack.Push(inputNumbers[i]);
}
for (int i = 0; i < numberOfPops; i++)
{
numberStack.Pop();
}
if (numberStack.Contains(numberToFind))
{
Console.WriteLine("true");
}
else
{
Console.WriteLine(numberStack.Count > 0 ? numberStack.Min() : 0);
}
}
static void Main(string[] args)
{
Customer c1 = new Customer()
{
Id = 101,
Name = "Oscar",
Gender = "Male"
};
Customer c2 = new Customer()
{
Id = 102,
Name = "Alejandara",
Gender = "Female"
};
Customer c3 = new Customer()
{
Id = 103,
Name = "Juan",
Gender = "Male"
};
Customer c4 = new Customer()
{
Id = 104,
Name = "Johanna",
Gender = "Female"
};
Customer c5 = new Customer()
{
Id = 105,
Name = "Ricardo",
Gender = "Male"
};
// LIFO -> Last in First Out
Stack<Customer> stackCustomers = new Stack<Customer>();
stackCustomers.Push(c1);
stackCustomers.Push(c2);
stackCustomers.Push(c3);
stackCustomers.Push(c4);
stackCustomers.Push(c5);
Customer tmpC1 = stackCustomers.Pop();
Console.WriteLine(tmpC1.Id + " - " + tmpC1.Name + " was removed!");
Console.WriteLine("Customers on the stack {0}", stackCustomers.Count);
Console.ReadKey();
}
static void Main(string[] args)
{
Stack<int> numbers = new Stack<int>();
Console.ReadLine()
.Split(" ".ToCharArray(), StringSplitOptions.RemoveEmptyEntries)
.Select(int.Parse)
.ToList()
.ForEach(n => numbers.Push(n));
while (numbers.Count > 0)
{
Console.Write($"{numbers.Pop()} ");
}
Console.WriteLine();
}
static void Main(string[] args)
{
var numberOfQueries = int.Parse(Console.ReadLine());
var stack = new Stack<int>();
var maxStack = new Stack<int>();
maxStack.Push(int.MinValue);
for (int i = 0; i < numberOfQueries; i++)
{
var parameters = Console.ReadLine().Split().Select(int.Parse).ToArray();
var operation = parameters[0];
switch (operation)
{
case 1:
var number = parameters[1];
stack.Push(number);
if (stack.Peek() > maxStack.Peek())
{
maxStack.Push(stack.Peek());
}
break;
case 2:
var num = stack.Pop();
if (num == maxStack.Peek())
{
maxStack.Pop();
}
break;
case 3:
Console.WriteLine(maxStack.Peek());
break;
default:
break;
}
}
}
