Compilare: main.cpp: In function 'bool check(long long int)': main.cpp:26:25: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare] 26 | if (s[i].size() < lg) | ~~~~~~~~~~~~^~~~ main.cpp:40:34: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (long long j = lg; j < s[i].size(); j++) | ~~^~~~~~~~~~~~~