Compilare: user.cpp: In function ‘bool good(const std::vector<std::basic_string<char> >&, int)’: user.cpp:18:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = lg-1; j < v[i].size(); ++j) ^ user.cpp:28:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 1; k < v.size(); ++k) ^ user.cpp:34:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(ap == v.size() - 1) ^ user.cpp: In function ‘int main()’: user.cpp:52:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(v[i].size() < mn) ^ user.cpp:58:23: warning: ‘mnInd’ may be used uninitialized in this function [-Wmaybe-uninitialized] swap(v[0], v[mnInd]); ^