Compilare: user.cpp: In function ‘int isPeriodic(const std::vector<int>&)’: user.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (right < v.size()) { ^ user.cpp:71:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (right == v.size() - 1 && currentPeriod == 0) { ^ user.cpp: In function ‘int main()’: user.cpp:109:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < positions.size(); ++i) { ^ user.cpp:92:15: warning: unused variable ‘idx’ [-Wunused-variable] int N, P, idx = 0; ^