Borderou de evaluare (job #206403)

Compilare: user.c: In function ‘phi’: user.c:5:17: warning: unused variable ‘lim’ [-Wunused-variable] user.c: In function ‘main’: user.c:23:13: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:24:13: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] user.c:27:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]