Compilare: main.cpp: In function 'void dfs(int)': main.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i = 0; i < v[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:51:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for (int i = 0; i < sol.size(); ++i) | ~~^~~~~~~~~~~~