Compilare: user.cpp: In function ‘int main()’: user.cpp:72:24: warning: statement has no effect [-Wunused-value] NR << 1; ^ user.cpp:81:36: warning: statement has no effect [-Wunused-value] NR << 1; ^ user.cpp:15:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &T, &N); ^ user.cpp:19:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &X); ^