Compilare: main.cpp: In function 'int main()': main.cpp:38:25: warning: loop variable '<structured bindings>' creates a copy from type 'const std::pair<int, int>' [-Wrange-loop-construct] 38 | for (const auto [nod,pondere] : adj[p.second]) { | ^~~~~~~~~~~~~ main.cpp:38:25: note: use reference type to prevent copying 38 | for (const auto [nod,pondere] : adj[p.second]) { | ^~~~~~~~~~~~~ | &