Compilare: main.cpp: In function 'bool matchSubstring(int, std::vector<std::__cxx11::basic_string<char> >)': main.cpp:30:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0, searchedSubstring = 0; k < seqs.at(0).size(); ++k) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:34:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1, substringMatches = 0; i < seqs.size(); ++i) { ~~^~~~~~~~~~~~~ main.cpp:35:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0, substring = 0; j < seqs.at(i).size(); ++j) { ~~^~~~~~~~~~~~~~~~~~~ main.cpp:45:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (substringMatches == seqs.size() - 1) { ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~