Compilare: main.cpp: In function 'int main()': main.cpp:62:20: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 62 | if (sol.size() != n) { | ~~~~~~~~~~~^~~~ main.cpp:66:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (int i = 0; i < sol.size(); i++) { | ~~^~~~~~~~~~~~