/in/foo.cc: In function 'int main()':
/in/foo.cc:14:57: error: template argument 2 is invalid
  unordered_map<tuple<int, int>, vector<tuple<int, int>> hash;
                                                         ^~~~
/in/foo.cc:14:57: error: template argument 5 is invalid
/in/foo.cc:17:7: error: missing template arguments before '[' token
   hash[make_tuple(color, i & 1)].push_back(make_tuple(number[i], i));
       ^
/in/foo.cc:20:20: error: missing template arguments before ')' token
  for (auto &m: hash) {
                    ^
/in/foo.cc:21:17: error: unable to deduce 'auto&&' from 'm'
   for (auto &e: m)
                 ^