Compilare: main.cpp: In function 'int main()': main.cpp:36:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for (int i = 0; i < sol.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:37:34: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | cout << sol[i] << (i + 1 < sol.size() ? ' ' : '\n'); | ~~~~~~^~~~~~~~~~~~