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  1. function solve(input) {
  2.     const lines = input.trim().split('\n');
  3.  
  4.     for (const line of lines) {
  5.         const freq = {};
  6.  
  7.         for (const ch of line) {
  8.             freq[ch] = (freq[ch] || 0) + 1;
  9.         }
  10.  
  11.         if (Object.values(freq).some(count => count === 2)) {
  12.             console.log(line);
  13.         }
  14.     }
  15. }
  16.  
  17. solve(`asdf
  18. fdas
  19. asds
  20. d fm
  21. dfaa
  22. aaaa
  23. aabb
  24. aaabb`);
Success #stdin #stdout 0.06s 42832KB
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stdin
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Standard input is empty
stdout
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asds
dfaa
aabb
aaabb
https://ideone.com/c4dvoS
language:
Node.js (node 20.14)
created:
11 hours ago
visibility:
public

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