Compilare: main.cpp: In function 'void dfs(int)': main.cpp:21:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for (int i = 0; i < g[node].size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs_inv(int)': main.cpp:32:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int i = 0; i < rev[node].size(); i++) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:74:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (int j = 0; j < components[val].size(); j++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~