Compilare: user.cpp: In function ‘long long int getInverse(long long int)’: user.cpp:22:21: warning: variable ‘D’ set but not used [-Wunused-but-set-variable] long long X, Y, D; ^ user.cpp: In function ‘int main()’: user.cpp:60:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("dirichlet.in" ,"r", stdin ); ^ user.cpp:61:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ("dirichlet.out","w", stdout); ^ user.cpp:64:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf ("%d", &N); ^