Compilare: main.cpp: In function 'bool ok(int, int)': main.cpp:11:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | while (i < s[a].size() && j < s[b].size()) { | ~~^~~~~~~~~~~~~ main.cpp:11:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | while (i < s[a].size() && j < s[b].size()) { | ~~^~~~~~~~~~~~~ main.cpp:16:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | if (i == s[a].size()) | ~~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:29: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 32 | if (s[i].size() > mx) { | ~~~~~~~~~~~~^~~~ main.cpp:36:34: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 36 | else if (s[i].size() == mx && s[i] < s1) | ~~~~~~~~~~~~^~~~~