Compilare: user.cpp: In function ‘std::vector<int> buildKMP(std::string)’: user.cpp:13:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < pattern.length()) ^ user.cpp: In function ‘int main()’: user.cpp:46:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (j < text.length()) ^ user.cpp:52:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == pattern.length()) //matched whole pattern ^