Compilare: main.cpp: In function 'bool cauta(std::string, std::string)': main.cpp:12:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i = 0; i < a.size(); i++){ | ~~^~~~~~~~~~ main.cpp:13:13: warning: statement has no effect [-Wunused-value] 13 | for(k; k < b.size(); k++){ | ^ main.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(k; k < b.size(); k++){ | ~~^~~~~~~~~~ main.cpp:21:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | if(c == a.size()) | ~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:30: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 40 | if(arr[i].size() > nmax){ | ~~~~~~~~~~~~~~^~~~~~