Compilare: main.cpp: In function 'void dfs(int)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < g[node].size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs_inv(int)': main.cpp:31:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 0; i < rev[node].size(); i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int j = 0; j < components[i].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~