Compilare: main.cpp: In function 'int main()': main.cpp:22:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::__cxx11::basic_string<char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int i = 1; i < v.size(); i++){ | ~~^~~~~~~~~~ main.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (; j < v[i].size() && j < v[i - 1].size(); j++) | ~~^~~~~~~~~~~~~ main.cpp:24:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (; j < v[i].size() && j < v[i - 1].size(); j++) | ~~^~~~~~~~~~~~~~~~~