Compilare: main.cpp: In function 'int main()': main.cpp:37:25: warning: loop variable 'vecin' creates a copy from type 'const std::pair<int, int>' [-Wrange-loop-construct] 37 | for (const auto vecin: G[nod]) { | ^~~~~ main.cpp:37:25: note: use reference type to prevent copying 37 | for (const auto vecin: G[nod]) { | ^~~~~ | &