Compilare: user.cpp: In constructor ‘BIT::BIT(int, int)’: user.cpp:20:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < _container.size(); i++) ^ user.cpp: In member function ‘void BIT::Clear()’: user.cpp:27:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < _container.size(); i++) ^ user.cpp: In member function ‘void BIT::Update(int, int, int)’: user.cpp:34:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = a; i <= _container.size() - 1; i += idx(i)) ^ user.cpp:36:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = b; j <= _container[i].size() - 1; j += idx(j)) ^ user.cpp: In function ‘int main()’: user.cpp:79:15: warning: unused variable ‘a’ [-Wunused-variable] int T, i, j, a, b, c, N; ^ user.cpp:79:18: warning: unused variable ‘b’ [-Wunused-variable] int T, i, j, a, b, c, N; ^ user.cpp:79:21: warning: unused variable ‘c’ [-Wunused-variable] int T, i, j, a, b, c, N; ^ user.cpp:87:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d", &N, &T); ^ user.cpp:96:62: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d%d%d", &boxes[i].x, &boxes[i].y, &boxes[i].z); ^