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  1. #include <iostream>
  2. #include <string>
  3. #include <set>
  4. using namespace std;
  5.  
  6. struct lexical_compare {
  7. 	bool operator()  (int a, int b) {
  8. 		return to_string(a) < to_string(b);
  9. 	}
  10. };
  11.  
  12. int main() {
  13.     set<int, lexical_compare> s;
  14.  
  15.     s.insert(1);
  16.     s.insert(10);
  17.     s.insert(11);
  18.     s.insert(100);
  19.  
  20.     for (int x : s)
  21.         cout << x << ' ';
  22.  
  23.     return 0;
  24. }
Success #stdin #stdout 0s 5292KB
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stdin
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Standard input is empty
stdout
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1 10 100 11
https://ideone.com/cWSAO4
language:
C++14 (gcc 8.3)
created:
5 days ago
visibility:
public

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