Compilare: main.cpp: In function 'int main()': main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 0; i < a.length(); i++){ | ~~^~~~~~~~~~~~ main.cpp:30:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 30 | for(int i = 1; i < b.length() - a.length() + 1; i++){ | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~