Compilare: main.cpp: In function 'void DFS(int)': main.cpp:24:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int w = 0; w < adj[u].size(); ++w) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void DFS_2(int, int)': main.cpp:40:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int w = 0; w < aux[u].size(); ++w) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:99:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 99 | for (int j = 0; j < toate[i].size(); ++j) | ~~^~~~~~~~~~~~~~~~~ main.cpp:72:9: warning: unused variable 'nr' [-Wunused-variable] 72 | int nr = 0, contor = 0; | ^~