Compilare: user.cpp: In constructor ‘KMP::KMP(std::string)’: user.cpp:13:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=2; i<this->pattern.length(); ++i) { ^ user.cpp: In member function ‘std::vector<int> KMP::match(std::string)’: user.cpp:37:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=1; i<text.length(); ++i) { ^ user.cpp:46:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (k == pattern.length() - 1) { ^