Check_Palindrome.md

🔷 Check Palindrome Challenge:

Challenge description

Given the string, check if it is a palindrome.

Example

• For inputString = "aabaa", the output should be
  solution(inputString) = true;
• For inputString = "abac", the output should be
  solution(inputString) = false;
• For inputString = "a", the output should be
  solution(inputString) = true.

Input/Output

• [execution time limit] 3 seconds (java)

• [memory limit] 1 GB

• [input] string inputString

  A non-empty string consisting of lowercase characters.

  Guaranteed constraints:
  1 ≤ inputString.length ≤ 105.

• [output] boolean

  true if inputString is a palindrome, false otherwise.

[Java] Syntax Tips

// Prints help message to the console
// Returns a string
// 
// Globals declared here will cause a compilation error,
// declare variables inside the function instead!
String helloWorld(String name) {
    System.out.println("This prints to the console when you Run Tests");
    return "Hello, " + name;
}

Solutions:

• JS solution

  CodeSignalSolutions/Check_Palindrome/Check_palindrome.js

  Lines 1 to 10 in a7481de

  	function solution(word){
  	for (let i = 0, j = word.length - 1; i<word.length/2; i++, j-- )
  	if(word[i] != word[j])
  	return false
  	return true
  	}
  	console.log('"aabaa" is' + (solution("aabaa")?' ': ' not ') + 'a palindrome')
  	console.log('"a" is' + (solution("a")?' ': ' not') + ' a palindrome')
  	console.log('"abac" is ' + (solution("abac")? '': 'not') + ' a palindrome')

  

• Java solution

  CodeSignalSolutions/Check_Palindrome/Check_palindrome.java

  Lines 1 to 14 in a7481de

  	public class Check_palindrome{
  	public static boolean solution (String inputString){
  	for(int left = 0, right = inputString.length()-1; left<inputString.length()/2; left++, right--)
  	if(inputString.charAt(left) != inputString.charAt(right))
  	return false;
  	return true;
  	}
  	public static void main(String[] args){
  	System.out.println(" 'aabaa' is " + (solution("aabaa")? "": "not") + " a palindrome.");
  	System.out.println(" 'abac' is " + (solution("abac")? " a palindrome": "not a palindrome."));
  	System.out.println(" 'a' is a palindrome? " + solution("a") );
  	}
  	}