/in/foo.cc: In function 'int main()':
/in/foo.cc:34:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   34 |         auto [x, y, d] = pq.top();
      |              ^
/in/foo.cc:73:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   73 |         auto [x, y] = q.front();
      |              ^