Borderou de evaluare (job #8281)

Compilare: user.c: In function ‘main’: user.c:7:100: warning: unused variable ‘i’ [-Wunused-variable] user.c:7:98: warning: unused variable ‘n’ [-Wunused-variable] user.c:7:95: warning: unused variable ‘ub’ [-Wunused-variable] user.c:7:92: warning: unused variable ‘ua’ [-Wunused-variable] user.c:7:20: warning: unused variable ‘invb’ [-Wunused-variable] user.c:7:13: warning: unused variable ‘inva’ [-Wunused-variable] user.c:9:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result]