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  1. #include <set>
  2. #include <iostream>
  3.  
  4. int main()
  5. {
  6.     auto comp = [](const auto& a, const auto& b) { return a.second < b.second; };
  7.     std::set<std::pair<int, int>, decltype(comp) > s(comp);
  8.  
  9.     s.insert(std::make_pair(1, 1));
  10.     s.insert(std::make_pair(2, 1));
  11.     s.insert(std::make_pair(3, 1));
  12.  
  13.     for(auto const &kv : s)
  14.         std::cout << "Value: " << kv.second << std::endl;
  15.  
  16.     return 0;
  17. }
Success #stdin #stdout 0s 4516KB
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stdin
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Standard input is empty
stdout
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Value: 1
https://ideone.com/W1taJT
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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