Compilare: main.cpp: In function 'void solve(int)': main.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for(int i = 1;i < s.size();i++){ | ~~^~~~~~~~~~ main.cpp:43:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(int i = 0;i < sol.size();i++){ | ~~^~~~~~~~~~~~