Compilare: main.cpp: In function 'int main()': main.cpp:19:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for(int j = 0; j < line.size(); j++){ | ~~^~~~~~~~~~~~~ main.cpp:70:46: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | for(int i = ct.size() - 4; i < ct.size(); i++) | ~~^~~~~~~~~~~