Compilare: main.cpp: In function 'int main()': main.cpp:28:35: warning: loop variable 'edge' of type 'const std::pair<int, int>&' binds to a temporary constructed from type 'std::pair<const int, int>' [-Wrange-loop-construct] 28 | for (const pair<int,int>& edge : G[nodes.front()]) { | ^~~~ main.cpp:28:35: note: use non-reference type 'const std::pair<int, int>' to make the copy explicit or 'const std::pair<const int, int>&' to prevent copying