foo.cc: In function 'void calc(int, int)':
foo.cc:71:23: warning: comparison of integer expressions of different signedness: 'std::priority_queue<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   71 |         if (q1.size() != sz)t -= q1.top();
      |             ~~~~~~~~~~^~~~~

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