Rotation Check
Medium
PHP
PHP Strings
38 views
Problem Statement
Check if b is a rotation of a (case-sensitive). Print YES or NO.
Input Format
Two lines a and b.
Output Format
YES or NO.
Example
abcd cdab
YES
Constraints
|a|,|b|
Input / Output Format
Input Format
Two lines a and b.
Output Format
YES or NO.
Constraints
|a|,|b|
Examples
Input:
abcd
cdab
Output:
YES
Example Solution (Public)
<?php
$inputText=rtrim(stream_get_contents(STDIN));
if($inputText==='') exit;
$inputLines=preg_split('/\\R/', $inputText);
$a=$inputLines[0] ?? '';
$b=$inputLines[1] ?? '';
if(strlen($a)!==strlen($b)){ echo 'NO'; exit; }
$twice=$a.$a;
echo (strpos($twice,$b)!==false) ? 'YES' : 'NO';
?>
Official Solution Code
<?php
$inputText=rtrim(stream_get_contents(STDIN));
if($inputText==='') exit;
$inputLines=preg_split('/\\R/', $inputText);
$a=$inputLines[0] ?? '';
$b=$inputLines[1] ?? '';
if(strlen($a)!==strlen($b)){ echo 'NO'; exit; }
$twice=$a.$a;
echo (strpos($twice,$b)!==false) ? 'YES' : 'NO';
?>
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