Compilare: user.cpp: In function ‘std::vector<int> Z(std::string, const string&)’: user.cpp:16:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < s.size() && s[i] == s[i-1]; ++i, ++z[1]); ^ user.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 2; i < s.size(); ++i) ^ user.cpp:25:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(dr < s.size() && s[dr] == s[dr-i]) ^ user.cpp:29:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = pattern.size(); i < z.size(); ++i) ^ user.cpp:30:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(z[i] >= pattern.size()) ^ user.cpp: In function ‘int main()’: user.cpp:43:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size() && i < 1000; ++i) ^