Compilare: main.cpp: In function 'int main()': main.cpp:70:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 70 | while(i < pattern.size()) | ~~^~~~~~~~~~~~~~~~ main.cpp:83:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for(i = pattern.size() - 1; i < str.size() - pattern.size() + 1; ++i) | ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~