Compilare: user.cpp: In function ‘std::vector<int> ZValues(const string&)’: user.cpp:20:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0, lt = 0, rt = 0; k < P.size(); ++k) { ^ user.cpp:23:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i + k < P.size() && P[i] == P[i + k]; ++i); ^ user.cpp:37:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = rt + 1; i < P.size() && P[i] == P[i - k]; ++i); ^ user.cpp: In function ‘std::pair<int, std::vector<int> > strMatch(const string&, const string&)’: user.cpp:61:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i < sp.size()) { ^ user.cpp:70:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (; P[p] == T[t] && p < P.size(); ++p, ++t); ^ user.cpp:71:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (p == P.size()) { ^ user.cpp:73:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (numMatches <= matches.capacity()) { ^