Compilare: main.cpp: In function 'bool ok(int, const std::vector<std::__cxx11::basic_string<char> >&)': main.cpp:21:23: 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] 21 | for (int i = 0; i < v.size(); i++) { | ~~^~~~~~~~~~ main.cpp:22:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (int j = 0; j + x - 1 < v[i].size(); j++) { | ~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:32:27: 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] 32 | for (int i = 1; i < v.size(); i++) | ~~^~~~~~~~~~