4
19/10/2024 9:51 오전
주제 스타터
- Will be given sequence of words all elements that present in it odd number of times (case-insensitive).
- Print the result elements in lowercase, in order of appearance.
Example:
2개 답글
3
19/10/2024 9:52 오전
Here is my solution:
<?php
$text = array_map("strtolower", explode(" ", readline()));
$words = [];
foreach ($text as $currentWord) {
if (key_exists($currentWord, $words)) {
$words[$currentWord]++;
} else {
$words[$currentWord] = 1;
}
}
foreach ($words as $word => $count) {
if ($count % 2 !== 0) {
echo $word . " ";
}
}
2
19/10/2024 9:54 오전
My solution:
<?php
$input = array_map('strtolower', explode(' ', readline()));
$arr = [];
for ($i = 0; $i < count($input); $i++) {
$word = $input[$i];
if (!key_exists($word, $arr)) {
$arr[$word] = 1;
} else {
$arr[$word]++;
}
}
$final = [];
foreach ($arr as $key => $value) {
if ($value % 2 !== 0) {
$final[] = $key;
}
}
echo implode(' ', $final);
