Borderou de evaluare (job #15280)

Compilare: user.c: In function 'main': user.c:28:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] user.c:10:19: warning: unused variable 'j' [-Wunused-variable] user.c:8:12: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] user.c:9:12: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] user.c:11:10: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]