Compilare: user.c: In function ‘compute’: user.c:28:6: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.c: In function ‘factorial_remainder’: user.c:12:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.c: In function ‘main’: user.c:42:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%d", &t); ^ user.c:45:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f, "%lld%lld", &n, &k); ^