Compilare: user.c: In function ‘ssnd’: user.c:21:19: warning: unused variable ‘p’ [-Wunused-variable] long long i,a,p; ^ user.c: In function ‘main’: user.c:52:19: warning: unused variable ‘j’ [-Wunused-variable] long long t,i,j,n,nr,s; ^ user.c:49:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(File_in, "r", stdin); ^ user.c:50:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen(File_out, "w", stdout); ^ user.c:53:10: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&t); ^ user.c:57:14: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld",&n); ^