/in/foo.cc: In function 'int main()':
/in/foo.cc:33:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   33 |         auto [d, u] = pq.top();
      |              ^
/in/foo.cc:40:19: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' [-Wc++17-extensions]
   40 |         for (auto [v, w] : graph[u]) {
      |                   ^