Swap Two Numbers (No Temp)
Easy
PHP
PHP Variables
19 views
Problem Statement
Two integers a and b are given. Swap them without using a third variable and print the result.
Input Format
One line: a b.
Output Format
One line: swapped_a swapped_b.
Example
5 9
9 5
Constraints
-10^9
Input / Output Format
Input Format
One line: a b.
Output Format
One line: swapped_a swapped_b.
Constraints
-10^9
Examples
Input:
5 9
Output:
9 5
Example Solution (Public)
<?php
$inputText=trim(stream_get_contents(STDIN));
if($inputText==='') exit;
[$a,$b]=array_map('intval',preg_split('/\\s+/', $inputText));
$a=$a+$b; $b=$a-$b; $a=$a-$b;
echo $a.' '.$b;
?>
Official Solution Code
<?php
$inputText=trim(stream_get_contents(STDIN));
if($inputText==='') exit;
[$a,$b]=array_map('intval',preg_split('/\\s+/', $inputText));
$a=$a+$b; $b=$a-$b; $a=$a-$b;
echo $a.' '.$b;
?>
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