Compilare: user.c: In function ‘main’: user.c:22:5: warning: format ‘%lld’ expects argument of type ‘long long int *’, but argument 3 has type ‘int *’ [-Wformat=] fscanf( fin, "%lld", &n ); ^ user.c:30:5: warning: format ‘%lld’ expects argument of type ‘long long int’, but argument 3 has type ‘int’ [-Wformat=] fprintf( fout, "%lld", S ); ^ user.c:22:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%lld", &n ); ^