Compilare: main.cpp: In function 'int main()': main.cpp:44:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int i = 0 ; i < ans[0].size() ; ++ i) fout << "2 " << ans[0][i] << '\n'; | ~~^~~~~~~~~~~~~~~ main.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 46 | for(int i = 0 ; i < ans[1].size() ; ++ i) fout << "1 " << ans[1][i] << '\n'; | ~~^~~~~~~~~~~~~~~