Compilare: user.cpp: In function ‘int calculate_max_secv(std::vector<bool>, int)’: user.cpp:29:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = k + 1; i < bits.size(); i++) ^ user.cpp:34:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i + j < bits.size()) ^ user.cpp:36:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while ((i + j < bits.size()) && bits[i + j] == 1) ^ user.cpp: In function ‘int flip(std::vector<bool>)’: user.cpp:55:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < bits.size(); i++) ^ user.cpp:77:10: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] bits[poz] = 1; ^