Compilare: user.cpp: In function ‘std::vector<int> KMP(const string&, const string&)’: user.cpp:17:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < pattern.size(); ++i) ^ user.cpp:30:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < s.size(); ++i) ^ user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(pos == pattern.size()) ^ user.cpp: In function ‘int main()’: user.cpp:52:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size() && i < 1000; ++i) ^