Compilare: user.c: In function ‘main’: user.c:6:20: warning: variable ‘beg’ set but not used [-Wunused-but-set-variable] int i,n,m,q,fl,beg,max,x,y; ^ user.c:8:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("aiacusarpe.in","r",stdin); ^ user.c:9:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("aiacusarpe.out","w",stdout); ^ user.c:10:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d\n",&n,&m,&q); ^