Compilare: user.cpp: In function ‘void Compute()’: user.cpp:47:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v.size() < k) ^ user.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = k ; i < v.size() ; ++i) ^ user.cpp: In function ‘void Insert(std::deque<char>, int)’: user.cpp:72:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i(0) ; i < s.size() ; ++i) ^ user.cpp: In function ‘int Query(std::deque<char>&)’: user.cpp:86:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i(0) ; i < s.size() ; ++i) ^ user.cpp: In function ‘void Dynamic()’: user.cpp:113:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0 ; i < v.size() ; ++i) ^ user.cpp:115:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0 ; j < Update[i % k].size() ; ++j) ^