Compilare: main.cpp: In function 'std::vector<int> make_pattern(std::__cxx11::string)': main.cpp:14:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (i != a.size()) { ~~^~~~~~~~~~~ main.cpp: In function 'void solve(std::__cxx11::string, std::__cxx11::string)': main.cpp:44:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;i_text!=text.size();i_text++) ~~~~~~^~~~~~~~~~~~~ main.cpp:50:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i_pattern==pattern.size()) ~~~~~~~~~^~~~~~~~~~~~~~~~