Compilare: main.cpp: In function 'void solve()': main.cpp:64:25: warning: loop variable 'edge' creates a copy from type 'const std::pair<int, int>' [-Wrange-loop-construct] 64 | for (const auto edge : g[current]) { | ^~~~ main.cpp:64:25: note: use reference type to prevent copying 64 | for (const auto edge : g[current]) { | ^~~~ | &