Compilare: main.cpp: In function 'std::vector<int> solve(int, const std::vector<std::vector<int> >&)': main.cpp:13:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int j = 0;j < adj[i].size();++j) | ~~^~~~~~~~~~~~~~~ main.cpp:29:33: 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 < adj[nod].size();++i) | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i = 0;i < ans.size();++i) | ~~^~~~~~~~~~~~