Compilare: user.cpp: In function ‘int* precalc(std::string)’: user.cpp:12:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<pattern.size();i++) ^ user.cpp: In function ‘std::vector<int> kmp(std::string, std::string)’: user.cpp:45:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(;m<txt.size();) ^ user.cpp:47:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i==pattern.size()) ^