19 - Day 18 - Queues and Stacks.cs

// ========================
//       Information
// ========================

// Direct Link: https://www.hackerrank.com/challenges/30-queues-stacks/problem
// Difficulty: Easy
// Max Score: 30
// Language: C#

// ========================
//         Solution
// ========================

using System;
using System.Collections.Generic;
using System.IO;

class Solution {
	public Stack < char > charS = new Stack < char > ();
	public Queue < char > charQ = new Queue < char > ();

	void pushCharacter(char c) {
		charS.Push(c);
	}

	char popCharacter() {
		return charS.Pop();
	}
	void enqueueCharacter(char c) {
		charQ.Enqueue(c);
	}

	char dequeueCharacter() {
		return charQ.Dequeue();
	}

	static void Main(String[] args) {
		// read the string s.
		string s = Console.ReadLine();

		// create the Solution class object p.
		Solution obj = new Solution();

		// push/enqueue all the characters of string s to stack.
		foreach(char c in s) {
			obj.pushCharacter(c);
			obj.enqueueCharacter(c);
		}

		bool isPalindrome = true;

		// pop the top character from stack.
		// dequeue the first character from queue.
		// compare both the characters.
		for (int i = 0; i < s.Length / 2; i++) {
			if (obj.popCharacter() != obj.dequeueCharacter()) {
				isPalindrome = false;

				break;
			}
		}
		// finally print whether string s is palindrome or not.
		if (isPalindrome) {
			Console.Write("The word, {0}, is a palindrome.", s);
		} else {
			Console.Write("The word, {0}, is not a palindrome.", s);
		}
	}
}