Compilare: main.cpp: In function 'int main()': main.cpp:28:35: warning: loop variable 'edge' of type 'const std::pair<short int, short int>&' binds to a temporary constructed from type 'std::pair<const short int, short int>' [-Wrange-loop-construct] 28 | for (const pair<short,short>& edge : G[1]) { | ^~~~ main.cpp:28:35: note: use non-reference type 'const std::pair<short int, short int>' to make the copy explicit or 'const std::pair<const short int, short int>&' to prevent copying main.cpp:35:28: warning: comparison of integer expressions of different signedness: 'std::priority_queue<cv>::size_type' {aka 'long unsigned int'} and 'short int' [-Wsign-compare] 35 | if (ans.size() == K) { | ~~~~~~~~~~~^~~~ main.cpp:39:43: warning: loop variable 'edge' of type 'const std::pair<short int, short int>&' binds to a temporary constructed from type 'std::pair<const short int, short int>' [-Wrange-loop-construct] 39 | for (const pair<short,short>& edge : G[pq.top().node]) { | ^~~~ main.cpp:39:43: note: use non-reference type 'const std::pair<short int, short int>' to make the copy explicit or 'const std::pair<const short int, short int>&' to prevent copying