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  1. #include <utility>
  2. #include <unordered_map>
  3.  
  4. struct hash_pair {
  5.     template <typename T, typename U>
  6.     std::size_t operator ()(std::pair<T, U> const& p) const {
  7.         using std::hash;
  8.         return hash<T>()(p.first) ^ hash<T>()(p.second);
  9.     }
  10. };
  11.  
  12. std::unordered_map<std::pair<int, int>, int, hash_pair> predictor;
  13.  
  14. int main() {}
Success #stdin #stdout 0s 3012KB
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https://ideone.com/qgNUtE
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
secret

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