Compilare: main.cpp: In function 'void dfs(int, std::vector<int>&)': main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:64:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < isolated.size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < normal.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:73:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = normal.size() == 0 ? 1 : normal.size(); i < isolated.size(); i++) ~~^~~~~~~~~~~~~~~~~ main.cpp:79:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < res.size(); i++) ~~^~~~~~~~~~~~