pub mod input { pub trait Readable { type Output; fn read(r: &mut R) -> Self::Output; } macro_rules! impl_readable_for_int { ($($t:ty)*) => ($(impl Readable for $t { type Output = $t; #[inline] fn read(r: &mut R) -> Self::Output { let mut is_positive = true; let mut is_empty = true; let mut is_only_sign = true; let mut result: Self::Output = 0; loop { let buf = match r.fill_buf() { Ok(buf) => buf, Err(e) if e.kind() == std::io::ErrorKind::Interrupted => continue, Err(e) => panic!("{}", e), }; let (done, used, mut buf) = match buf.iter().position(u8::is_ascii_whitespace) { Some(i) => (i > 0 || !is_empty, i + 1, &buf[..i]), None => (buf.is_empty(), buf.len(), buf), }; if is_empty && buf.len() > 0 { is_empty = false; buf = match buf[0] { b'+' => &buf[1..], b'-' => { is_positive = false; &buf[1..] } _ => buf, }; } if buf.len() > 0 { is_only_sign = false; } if is_positive { for &c in buf { let x = (c as char).to_digit(10).expect("InvalidDigit"); result = result.checked_mul(10).expect("PosOverflow"); result = result.checked_add(x as $t).expect("PosOverflow"); } } else { for &c in buf { let x = (c as char).to_digit(10).expect("InvalidDigit"); result = result.checked_mul(10).expect("NegOverflow"); result = result.checked_sub(x as $t).expect("NegOverflow"); } } r.consume(used); if done { if is_empty { panic!("Empty"); } if is_only_sign { panic!("InvalidDigit"); } return result; } } } })*) } impl_readable_for_int! { i8 i16 i32 i64 i128 isize u8 u16 u32 u64 u128 usize } pub mod marker { use super::Readable; pub enum Usize1 {} impl Readable for Usize1 { type Output = usize; #[inline] fn read(r: &mut R) -> Self::Output { usize::read(r).checked_sub(1).expect("NegOverflow") } } pub enum Bytes {} impl Readable for Bytes { type Output = Vec; #[inline] fn read(r: &mut R) -> Self::Output { let mut result = Vec::new(); loop { let buf = match r.fill_buf() { Ok(buf) => buf, Err(e) if e.kind() == std::io::ErrorKind::Interrupted => continue, Err(e) => panic!("{}", e), }; let (done, used, buf) = match buf.iter().position(u8::is_ascii_whitespace) { Some(i) => (i > 0 || !result.is_empty(), i + 1, &buf[..i]), None => (buf.is_empty(), buf.len(), buf), }; result.extend_from_slice(buf); r.consume(used); if done { return result; } } } } } impl Readable for String { type Output = String; #[inline] fn read(r: &mut R) -> Self::Output { String::from_utf8(marker::Bytes::read(r)).unwrap() } } macro_rules! impl_readable_for_float { ($($t:ty)*) => ($(impl Readable for $t { type Output = $t; #[inline] fn read(r: &mut R) -> Self::Output { String::read(r).parse().unwrap() } })*) } impl_readable_for_float! { f32 f64 } macro_rules! impl_readable_for_tuple { ($head:ident, $($tail:ident),*) => { impl<$head, $($tail),*> Readable for ($head, $($tail),*) where $head: Readable, $($tail: Readable),*, { type Output = ( <$head as Readable>::Output, $(<$tail as Readable>::Output),*, ); #[inline] fn read(r: &mut R) -> Self::Output { (<$head>::read(r), $(<$tail>::read(r)),*) } } impl_readable_for_tuple!($($tail),*); }; ($head:ident) => {}; } impl_readable_for_tuple!(A, B, C, D, E, F, G, H, I, J); #[macro_export] macro_rules! read { ($r:expr, [$t:tt; $n:expr]) => {{ <[_; $n]>::try_from(read!($r, ($t; $n)).as_slice()).unwrap() }}; ($r:expr, ($t:tt)) => { read!($r, ($t; read!($r, usize))) }; ($r:expr, ($t:tt; $n:expr)) => { (0..$n).map(|_| read!($r, $t)).collect::>() }; ($r:expr, $t:ty) => { <$t>::read($r) }; } #[macro_export] macro_rules! input { ($r:expr, $($($v:ident)* : $t:tt),* $(,)?) => {$( let $($v)* = read!($r, $t); )*}; } } use input::Readable; fn run(reader: &mut R, writer: &mut W) { for _ in 0..read!(reader, usize) { let n = read!(reader, u64); let ans = (n - 2) * (n - 1) * n * 2 / 3; writeln!(writer, "{}", ans).ok(); } } fn main() { let (stdin, stdout) = (std::io::stdin(), std::io::stdout()); let ref mut reader = std::io::BufReader::new(stdin.lock()); let ref mut writer = std::io::BufWriter::new(stdout.lock()); run(reader, writer); }