HR30 Day 18: Queues and Stacks

1 개요

HR30 Day 18: Queues and Stacks

• https://www.hackerrank.com/challenges/30-queues-stacks/problem

해커랭크 30 Days of Code

문제	풀이
10-19 Day e
HR30 Day 10: Binary Numbers
HR30 Day 11: 2D Arrays
HR30 Day 12: Inheritance
HR30 Day 13: Abstract Classes
HR30 Day 14: Scope
HR30 Day 15: Linked List
HR30 Day 16: Exceptions - String to Integer
HR30 Day 17: More Exceptions
HR30 Day 18: Queues and Stacks
HR30 Day 19: Interfaces

2 Java

HR30 Day 18: Queues and Stacks/Java 문서를 참고하십시오.

public class Solution {
    // Write your code here.
    private Stack<Character> stack = new Stack<Character>();
    private Queue<Character> queue = new LinkedList<Character>();
    void pushCharacter(char ch) {
        stack.push(ch);
    }
    void enqueueCharacter(char ch) {
        queue.add(ch);
    }
    char popCharacter() {
        return stack.pop();
    }
    char dequeueCharacter() {
        return queue.remove();
    }

3 PHP

HR30 Day 18: Queues and Stacks/PHP 문서를 참고하십시오.

class Solution {
    // Write your code here
    private $stack = [];
    private $queue = [];
    function pushCharacter($ch) {
        array_push($this->stack, $ch);
    }
    function enqueueCharacter($ch) {
        array_push($this->queue, $ch);
    }
    function popCharacter() {
        return array_pop($this->stack);
    }
    function dequeueCharacter() {
        return array_shift($this->queue);
    }
}