Compilare: user.cpp: In function ‘int get_inverse(long long int, long long int)’: user.cpp:29:15: warning: variable ‘D’ set but not used [-Wunused-but-set-variable] int X, Y, D; ^ user.cpp: In function ‘int main()’: user.cpp:81:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%d", &N ); ^ user.cpp:91:46: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%d %d", &X, &Y ); ^