foo.cc: In function 'int main()':
foo.cc:27:9: error: 'sort' was not declared in this scope; did you mean 'short'?
   27 |         sort(q.begin(),q.end());
      |         ^~~~
      |         short
foo.cc:28:12: error: 'unique' was not declared in this scope
   28 |         if(unique(q.begin(),q.end())!=q.end()){
      |            ^~~~~~

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