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Reverse Words in a String

EASY

Given an input string, reverse the string word by word. A word is defined as a sequence of non-space characters.

The input string does not contain leading or trailing spaces and the words are always separated by a single space.

Example #1

Input

hello world

Output

world hello

Solution

<?php
$line = trim(fgets(STDIN));
$words = explode(' ', $line);
while ($words !== []) {
    echo array_pop($words);
    echo ' ';
}

Tests

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