Compilare: main.cpp: In function 'int main()': main.cpp:87:13: 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] 87 | while(i < pattern.size()) | ~~^~~~~~~~~~~~~~~~ main.cpp:102:32: 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] 102 | for(i = pattern.size() ; i < str.size(); ++i) | ~~^~~~~~~~~~~~