fork download
copy 
  1. <?php
  2.  
  3. $list = [];
  4. while (($line = fgets(STDIN)) !== false) {
  5.     $list[] = rtrim($line);
  6. }
  7.  
  8. $result = [];
  9.  
  10. foreach ($list as $item) {
  11.     $res = IsItsCharsAppearsTwice($item);
  12.     if ($res) {
  13.         $result[] = $res;
  14.     }
  15. }
  16.  
  17. foreach ($result as $word) {
  18.     echo $word, PHP_EOL;
  19. }
  20.  
  21. function IsItsCharsAppearsTwice($word)
  22. {
  23.     $map = [];
  24.     $len = strlen($word);
  25.  
  26.     for ($i = 0; $i < $len; $i++) {
  27.         $char = $word[$i];
  28.         $map[$char] = ($map[$char] ?? 0) + 1;
  29.     }
  30.  
  31.     foreach ($map as $char => $count) {
  32.         if ($count == 2) {
  33.             return $word;
  34.         }
  35.     }
  36.     return null;
  37. }
Success #stdin #stdout 0.02s 25372KB
comments (?)
stdin
copy 
asdf
fdas
asds
d fm
dfaa
aaaa
aabb
aaabb
stdout
copy 
asds
dfaa
aabb
aaabb
https://ideone.com/mhcUlw
language:
PHP (php 7.3.5)
created:
3 days ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!