Compilare: user.cpp: In function ‘void do_strmatch(const string&, const string&, int&, std::vector<int>&)’: user.cpp:28:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0, j = caut.size()+1; j < pi.size(); ++i, ++j){ ^ user.cpp:29:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pi[j] >= caut.size()){ ^ user.cpp: In function ‘int main()’: user.cpp:50:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < poz.size(); ++i){ ^