結果
| 問題 | No.754 畳み込みの和 |
| ユーザー |
 ngtkana
|
| 提出日時 | 2024-05-06 03:06:27 |
| 言語 | Rust (1.77.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 2,954 ms / 5,000 ms |
| コード長 | 28,738 bytes |
| コンパイル時間 | 12,739 ms |
| コンパイル使用メモリ | 377,028 KB |
| 実行使用メモリ | 11,520 KB |
| 最終ジャッジ日時 | 2024-11-28 05:27:07 |
| 合計ジャッジ時間 | 25,438 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge1 |
（要ログイン）
テストケース
テストケース表示| 入力 | 結果 | 実行時間 実行使用メモリ |
|---|---|---|
| testcase_00 | AC | 2,954 ms
11,520 KB |
| testcase_01 | AC | 2,871 ms
11,520 KB |
| testcase_02 | AC | 2,896 ms
11,520 KB |
コンパイルメッセージ
warning: unused import: `factorial::Factorial`
--> src/main.rs:330:13
|
330 | pub use factorial::Factorial;
| ^^^^^^^^^^^^^^^^^^^^
|
= note: `#[warn(unused_imports)]` on by default
warning: unused import: `fourier::any_mod_fps_mul`
--> src/main.rs:331:13
|
331 | pub use fourier::any_mod_fps_mul;
| ^^^^^^^^^^^^^^^^^^^^^^^^
warning: unused import: `fourier::fft`
--> src/main.rs:332:13
|
332 | pub use fourier::fft;
| ^^^^^^^^^^^^
warning: unused import: `fourier::fps_mul`
--> src/main.rs:333:13
|
333 | pub use fourier::fps_mul;
| ^^^^^^^^^^^^^^^^
warning: unused import: `fourier::ifft`
--> src/main.rs:334:13
|
334 | pub use fourier::ifft;
| ^^^^^^^^^^^^^
ソースコード
use proconio::input;
use std::ops::Add;
use std::ops::Mul;
use std::ops::Sub;
type Fp = fp::Fp<1000000007>;
fn main() {
input! {
n: usize,
a: [u64; n + 1],
b: [u64; n + 1],
}
let mut slice = vec![Fp::new(0); 6 * (n + 1).next_power_of_two() - 2];
for (i, &x) in a.iter().enumerate() {
slice[2 * i] = Fp::new(x);
}
for (i, &x) in b.iter().enumerate() {
slice[2 * i + 1] = Fp::new(x);
}
karatsuba(&mut slice);
let ans = slice[slice.len() - n - 1..].iter().sum::<Fp>();
println!("{}", ans);
}
trait Zero {
fn zero() -> Self;
}
impl Zero for Fp {
fn zero() -> Self {
Fp::new(0)
}
}
fn karatsuba<T>(slice: &mut Vec<T>)
where
T: Clone + Copy + Mul<Output = T> + Add<Output = T> + Sub<Output = T> + Zero + std::fmt::Debug,
{
assert_eq!(slice.len() % 6, 4);
let n = slice.len() / 6 + 1;
let mut tertiary = n * n;
let mut left = 2 * n;
let mut right = slice.len();
while tertiary != 0 {
for size in (0..(tertiary.trailing_zeros() as usize) / 2)
.rev()
.map(|i| 1 << i)
{
for (i, j) in (left - 4 * size..).zip(left - 2 * size..).take(2 * size) {
slice[left] = slice[i] + slice[j];
left += 1;
}
}
left -= 1;
let x = slice[left];
slice[left] = T::zero();
left -= 1;
let y = slice[left];
slice[left] = T::zero();
right -= 1;
slice[right] = x * y;
right -= 1;
tertiary -= 1;
for i in 0.. {
if tertiary >> (2 * i) & 3 != 3 {
break;
}
tertiary ^= 1 << (2 * i);
}
for size in (0..((tertiary.trailing_zeros() as usize) / 2).min(n.trailing_zeros() as usize))
.map(|i| 1 << i)
{
for ((i, j), k) in (right..)
.zip(right + 2 * size..)
.zip(right + 4 * size..)
.take(2 * size)
{
let (x, y, z) = (slice[i], slice[j], slice[k]);
(slice[i], slice[j], slice[k]) = (z - x - y, y, x);
}
for (i, j) in (right..).zip(right + 3 * size..).take(2 * size) {
slice[j] = slice[i] + slice[j];
slice[i] = T::zero();
}
right += 2 * size;
}
}
}
// fp {{{
// https://ngtkana.github.io/ac-adapter-rs/fp/index.html
#[allow(dead_code)]
mod fp {
mod ext_gcd {
pub(crate) fn mod_inv<const P: u64>(x: u64) -> u64 {
debug_assert!(P % 2 == 1);
debug_assert!(P < 1 << 31);
debug_assert!(x < P);
mod_inv_signed(x as i64, P as i64) as u64
}
fn mod_inv_signed(a: i64, m: i64) -> i64 {
debug_assert!(a > 0);
debug_assert!(m > 0);
if a == 1 {
return 1;
}
m + (1 - m * mod_inv_signed(m % a, a)) / a
}
}
mod factorial {
use super::Fp;
use std::ops::Index;
pub struct Factorial<const P: u64> {
fact: Vec<Fp<P>>,
inv_fact: Vec<Fp<P>>,
}
impl<const P: u64> Factorial<P> {
pub fn new(length: usize) -> Self {
let mut fact = vec![Fp::<P>::new(1); length + 1];
let mut inv_fact = vec![Fp::<P>::new(1); length + 1];
for i in 1..=length {
fact[i] = fact[i - 1] * Fp::<P>::new(i as u64);
}
inv_fact[length] = fact[length].inv();
for i in (1..=length).rev() {
inv_fact[i - 1] = inv_fact[i] * Fp::<P>::new(i as u64);
}
Self { fact, inv_fact }
}
pub fn fact(&self, n: usize) -> Fp<P> {
self.fact[n]
}
pub fn inv_fact(&self, n: usize) -> Fp<P> {
self.inv_fact[n]
}
pub fn perm(&self, n: usize, k: usize) -> Fp<P> {
self.fact[n] * self.inv_fact[n - k]
}
pub fn comb(&self, n: usize, k: usize) -> Fp<P> {
self.fact[n] * self.inv_fact[n - k] * self.inv_fact[k]
}
pub fn binom(&self, n: usize, k: usize) -> Fp<P> {
self.comb(n, k)
}
pub fn comb_or_zero(&self, n: usize, k: isize) -> Fp<P> {
if k < 0 || k as usize > n {
Fp::<P>::new(0)
} else {
self.comb(n, k as usize)
}
}
pub fn comb_with_reputation(&self, n: usize, k: usize) -> Fp<P> {
assert!(n > 0 || k > 0);
self.comb(n + k - 1, k)
}
}
impl<const P: u64> Index<usize> for Factorial<P> {
type Output = Fp<P>;
fn index(&self, index: usize) -> &Self::Output {
&self.fact[index]
}
}
}
mod fourier {
use super::mod_inv;
use super::Fp;
use super::PrimitiveRoot;
const P1: u64 = 924844033;
const P2: u64 = 998244353;
const P3: u64 = 1012924417;
type F1 = Fp<P1>;
type F2 = Fp<P2>;
type F3 = Fp<P3>;
pub fn fps_mul<const P: u64>(a: impl AsRef<[Fp<P>]>, b: impl AsRef<[Fp<P>]>) -> Vec<Fp<P>>
where
(): PrimitiveRoot<P>,
{
let a = a.as_ref();
let b = b.as_ref();
if a.is_empty() || b.is_empty() {
return vec![];
}
let mut a = a.to_vec();
let mut b = b.to_vec();
let n = a.len() + b.len() - 1;
let len = n.next_power_of_two();
a.resize(len, Fp::new(0));
b.resize(len, Fp::new(0));
fft(&mut a);
fft(&mut b);
for (a, b) in a.iter_mut().zip(b.iter()) {
*a *= *b;
}
ifft(&mut a);
a.truncate(n);
a
}
pub fn any_mod_fps_mul<const P: u64>(a: &[Fp<P>], b: &[Fp<P>]) -> Vec<Fp<P>> {
let v1 = fps_mul(
a.iter().map(|&x| F1::new(x.value())).collect::<Vec<_>>(),
b.iter().map(|&x| F1::new(x.value())).collect::<Vec<_>>(),
);
let v2 = fps_mul(
a.iter().map(|&x| F2::new(x.value())).collect::<Vec<_>>(),
b.iter().map(|&x| F2::new(x.value())).collect::<Vec<_>>(),
);
let v3 = fps_mul(
a.iter().map(|&x| F3::new(x.value())).collect::<Vec<_>>(),
b.iter().map(|&x| F3::new(x.value())).collect::<Vec<_>>(),
);
v1.into_iter()
.zip(v2)
.zip(v3)
.map(|((e1, e2), e3)| garner(e1, e2, e3))
.collect::<Vec<_>>()
}
pub fn fft<const P: u64>(f: &mut [Fp<P>])
where
(): PrimitiveRoot<P>,
{
let n = f.len();
assert!(n.is_power_of_two());
assert!((P - 1) % n as u64 == 0);
let mut root = <() as PrimitiveRoot<P>>::VALUE.pow((P - 1) / f.len() as u64);
let fourth = <() as PrimitiveRoot<P>>::VALUE.pow((P - 1) / 4);
let mut fft_len = n;
while 4 <= fft_len {
let quarter = fft_len / 4;
for f in f.chunks_mut(fft_len) {
let mut c = Fp::new(1);
for (((i, j), k), l) in (0..)
.zip(quarter..)
.zip(quarter * 2..)
.zip(quarter * 3..)
.take(quarter)
{
let c2 = c * c;
let x = f[i] + f[k];
let y = f[j] + f[l];
let z = f[i] - f[k];
let w = fourth * (f[j] - f[l]);
f[i] = x + y;
f[j] = c2 * (x - y);
f[k] = c * (z + w);
f[l] = c2 * c * (z - w);
c *= root;
}
}
root *= root;
root *= root;
fft_len = quarter;
}
if fft_len == 2 {
for f in f.chunks_mut(2) {
let x = f[0];
let y = f[1];
f[0] = x + y;
f[1] = x - y;
}
}
}
pub fn ifft<const P: u64>(f: &mut [Fp<P>])
where
(): PrimitiveRoot<P>,
{
let n = f.len();
assert!(n.is_power_of_two());
let root = <() as PrimitiveRoot<P>>::VALUE.pow((P - 1) / f.len() as u64);
let mut roots = std::iter::successors(Some(root.inv()), |x| Some(x * x))
.take(n.trailing_zeros() as usize + 1)
.collect::<Vec<_>>();
roots.reverse();
let fourth = <() as PrimitiveRoot<P>>::VALUE.pow((P - 1) / 4).inv();
let mut quarter = 1_usize;
if n.trailing_zeros() % 2 == 1 {
for f in f.chunks_mut(2) {
let x = f[0];
let y = f[1];
f[0] = x + y;
f[1] = x - y;
}
quarter = 2;
}
while quarter != n {
let fft_len = quarter * 4;
let root = roots[fft_len.trailing_zeros() as usize];
for f in f.chunks_mut(fft_len) {
let mut c = Fp::new(1);
for (((i, j), k), l) in (0..)
.zip(quarter..)
.zip(quarter * 2..)
.zip(quarter * 3..)
.take(quarter)
{
let c2 = c * c;
let x = f[i] + c2 * f[j];
let y = f[i] - c2 * f[j];
let z = c * (f[k] + c2 * f[l]);
let w = fourth * c * (f[k] - c2 * f[l]);
f[i] = x + z;
f[j] = y + w;
f[k] = x - z;
f[l] = y - w;
c *= root;
}
}
quarter = fft_len;
}
let d = Fp::from(f.len()).inv();
f.iter_mut().for_each(|x| *x *= d);
}
fn garner<const P: u64>(x1: Fp<P1>, x2: Fp<P2>, x3: Fp<P3>) -> Fp<P> {
let (x1, x2, x3) = (x1.value(), x2.value(), x3.value());
let x2 = ((x2 + (P2 - x1)) * mod_inv::<P2>(P1)) % P2;
let x3 =
(((x3 + (P3 - x1)) * mod_inv::<P3>(P1) % P3 + (P3 - x2)) * mod_inv::<P3>(P2)) % P3;
Fp::new(x1 + P1 * (x2 + P2 * x3 % P))
}
}
use ext_gcd::mod_inv;
pub use factorial::Factorial;
pub use fourier::any_mod_fps_mul;
pub use fourier::fft;
pub use fourier::fps_mul;
pub use fourier::ifft;
use std::iter::Product;
use std::iter::Sum;
use std::mem::swap;
use std::ops::Add;
use std::ops::AddAssign;
use std::ops::Div;
use std::ops::DivAssign;
use std::ops::Mul;
use std::ops::MulAssign;
use std::ops::Neg;
use std::ops::Sub;
use std::ops::SubAssign;
#[macro_export]
macro_rules! fp {
($value:expr) => {
$crate::fp::Fp::from($value)
};
($value:expr; mod $p:expr) => {
$crate::fp::Fp::<$p>::from($value)
};
}
pub trait PrimitiveRoot<const P: u64> {
const VALUE: Fp<P>;
}
impl PrimitiveRoot<998244353> for () {
const VALUE: Fp<998244353> = Fp::new(3);
}
impl PrimitiveRoot<1012924417> for () {
const VALUE: Fp<1012924417> = Fp::new(5);
}
impl PrimitiveRoot<924844033> for () {
const VALUE: Fp<924844033> = Fp::new(5);
}
#[derive(Clone, Copy, PartialEq, Eq, Hash)]
pub struct Fp<const P: u64> {
value: u64,
}
impl<const P: u64> Fp<P> {
pub const fn new(value: u64) -> Self {
Self { value: value % P }
}
pub const fn value(self) -> u64 {
self.value
}
pub fn inv(self) -> Self {
Self {
value: mod_inv::<P>(self.value),
}
}
pub fn pow(self, mut exp: u64) -> Self {
let mut result = Self::new(1);
let mut base = self;
while exp > 0 {
if exp & 1 == 1 {
result *= base;
}
base *= base;
exp >>= 1;
}
result
}
pub fn sign(pow: usize) -> Self {
Self::new(if pow % 2 == 0 { 1 } else { P - 1 })
}
}
impl<const P: u64> std::fmt::Debug for Fp<P> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
pub fn berlekamp_massey_fp(a: i64, p: i64) -> [i64; 2] {
let mut u0 = 0_i64;
let mut v0 = 1_i64;
let mut w0 = a * u0 + p * v0;
let mut u1 = 1_i64;
let mut v1 = 0_i64;
let mut w1 = a * u1 + p * v1;
while p <= w0 * w0 {
let q = w0 / w1;
u0 -= q * u1;
v0 -= q * v1;
w0 -= q * w1;
swap(&mut u0, &mut u1);
swap(&mut v0, &mut v1);
swap(&mut w0, &mut w1);
}
[w0, u0]
}
if self.value == 0 {
return write!(f, "0");
}
let [mut num, mut den] = berlekamp_massey_fp(self.value as i64, P as i64);
if den < 0 {
num = -num;
den = -den;
}
if den == 1 {
write!(f, "{}", num)
} else {
write!(f, "{}/{}", num, den)
}
}
}
impl<const P: u64> std::fmt::Display for Fp<P> {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
write!(f, "{}", self.value())
}
}
macro_rules! impl_from_signed {
($($t:ty),*) => {
$(
impl<const P: u64> From<$t> for Fp<P> {
fn from(x: $t) -> Self {
if x < 0 {
-Self::new((P as i64 - x as i64) as u64)
} else {
Self::new(x as u64)
}
}
}
)*
};
}
impl_from_signed!(i8, i16, i32, i64, i128, isize);
macro_rules! impl_from_unsigned {
($($t:ty),*) => {
$(
impl<const P: u64> From<$t> for Fp<P> {
fn from(x: $t) -> Self { Self::new(x as u64) }
}
)*
};
}
impl_from_unsigned!(u8, u16, u32, u64, u128, usize);
impl<const P: u64> AddAssign<Fp<P>> for Fp<P> {
fn add_assign(&mut self, rhs: Fp<P>) {
self.value += rhs.value;
if self.value >= P {
self.value -= P;
}
}
}
impl<const P: u64> SubAssign<Fp<P>> for Fp<P> {
fn sub_assign(&mut self, rhs: Fp<P>) {
if self.value < rhs.value {
self.value += P;
}
self.value -= rhs.value;
}
}
impl<const P: u64> MulAssign<Fp<P>> for Fp<P> {
fn mul_assign(&mut self, rhs: Fp<P>) {
self.value = self.value * rhs.value % P;
}
}
#[allow(clippy::suspicious_op_assign_impl)]
impl<const P: u64> DivAssign<Fp<P>> for Fp<P> {
fn div_assign(&mut self, rhs: Fp<P>) {
*self *= rhs.inv()
}
}
macro_rules! fp_forward_ops {
($(
$trait:ident,
$trait_assign:ident,
$fn:ident,
$fn_assign:ident,
)*) => {$(
impl<const P: u64> $trait_assign<&Fp<P>> for Fp<P> {
fn $fn_assign(&mut self, rhs: &Fp<P>) {
self.$fn_assign(*rhs);
}
}
impl<const P: u64, T: Into<Fp<P>>> $trait<T> for Fp<P> {
type Output = Fp<P>;
fn $fn(mut self, rhs: T) -> Self::Output {
self.$fn_assign(rhs.into());
self
}
}
impl<const P: u64> $trait<&Fp<P>> for Fp<P> {
type Output = Fp<P>;
fn $fn(self, rhs: &Fp<P>) -> Self::Output {
self.$fn(*rhs)
}
}
impl<const P: u64, T: Into<Fp<P>>> $trait<T> for &Fp<P> {
type Output = Fp<P>;
fn $fn(self, rhs: T) -> Self::Output {
(*self).$fn(rhs.into())
}
}
impl<const P: u64> $trait<&Fp<P>> for &Fp<P> {
type Output = Fp<P>;
fn $fn(self, rhs: &Fp<P>) -> Self::Output {
(*self).$fn(*rhs)
}
}
)*};
}
fp_forward_ops! {
Add, AddAssign, add, add_assign,
Sub, SubAssign, sub, sub_assign,
Mul, MulAssign, mul, mul_assign,
Div, DivAssign, div, div_assign,
}
impl<const P: u64> Neg for Fp<P> {
type Output = Fp<P>;
fn neg(mut self) -> Self::Output {
if self.value > 0 {
self.value = P - self.value;
}
self
}
}
impl<const P: u64> Sum for Fp<P> {
fn sum<I: Iterator<Item = Self>>(iter: I) -> Self {
iter.fold(Self::new(0), |acc, x| acc + x)
}
}
impl<'a, const P: u64> Sum<&'a Self> for Fp<P> {
fn sum<I: Iterator<Item = &'a Self>>(iter: I) -> Self {
iter.copied().sum()
}
}
impl<const P: u64> Product for Fp<P> {
fn product<I: Iterator<Item = Self>>(iter: I) -> Self {
iter.fold(Self::new(1), |acc, x| acc * x)
}
}
impl<'a, const P: u64> Product<&'a Self> for Fp<P> {
fn product<I: Iterator<Item = &'a Self>>(iter: I) -> Self {
iter.copied().product()
}
}
}
// }}}
// lg {{{
// https://ngtkana.github.io/ac-adapter-rs/lg/index.html
#[allow(dead_code)]
mod lg {
use std::borrow::Borrow;
use std::fmt;
use std::iter::once;
#[macro_export]
macro_rules! lg {
(@contents $head:expr $(, $tail:expr)*) => {{
$crate::__lg_internal!($head);
$(
eprint!(",");
$crate::__lg_internal!($tail);
)*
eprintln!();
}};
($($expr:expr),* $(,)?) => {{
eprint!("{}\u{276f}", line!());
$crate::lg!(@contents $($expr),*)
}};
}
#[doc(hidden)]
#[macro_export]
macro_rules! __lg_internal {
($value:expr) => {{
match $value {
head => {
eprint!(
" {} = {}",
stringify!($value),
$crate::lg::__quiet(format!("{:?}", &head))
);
}
}
}};
}
#[macro_export]
macro_rules! rows {
{
$index_label:literal,
$(@offset $offset:expr,)?
$(@verticalbar $verticalbar:expr,)*
$($(@$label:literal =>)? $values:expr),* $(,)?
} => {{
#![allow(unused_assignments)]
let mut rows = $crate::lg::Rows::default();
rows.line_number(line!());
$(rows.offset($offset);)?
$(rows.verticalbar($verticalbar);)*
rows.index_label($index_label);
$({
let mut label = stringify!($values).to_string();
if label.starts_with("&") {
label = label[1..].to_string();
}
$({
let label_: &'static str = $label;
label = label_.to_string();
})?
rows.row(label, $values);
})*
eprintln!("{}", rows.to_string_table());
}};
}
#[macro_export]
macro_rules! table {
{
$(@$name:literal => )? $values:expr $(,)?
} => {{
#![allow(unused_assignments)]
let mut name = stringify!($values).to_string();
if name.starts_with("&") {
name = name[1..].to_string();
}
$({
let name_: &'static str = $name;
name = name_.to_string();
})?
let mut rows = $crate::lg::Rows::default();
rows.line_number(line!());
rows.table_name(name);
#[allow(array_into_iter)]
for (i, row) in $values.into_iter().enumerate() {
rows.row(i.to_string(), row);
}
eprintln!("{}", rows.to_string_table());
}};
}
#[doc(hidden)]
pub fn __quiet(s: impl AsRef<str>) -> String {
s.as_ref()
.replace("340282366920938463463374607431768211455", "*") // u128
.replace("170141183460469231731687303715884105727", "*") // i128
.replace("18446744073709551615", "*") // u64
.replace("9223372036854775807", "*") // i64
.replace("-9223372036854775808", "*") // i64
.replace("4294967295", "*") // u32
.replace("2147483647", "*") // i32
.replace("-2147483648", "*") // i32
.replace("None", "*")
.replace("Some", "")
.replace("true", "#")
.replace("false", ".")
.replace(['"', '\''], "")
}
#[doc(hidden)]
#[derive(Default)]
pub struct Rows {
line_number: String,
index_label: String,
offset: usize,
verticalbars: Vec<usize>,
table_name: String,
rows: Vec<Row>,
}
impl Rows {
pub fn line_number(&mut self, line_number: u32) -> &mut Self {
self.line_number = format!("{}", line_number);
self
}
pub fn index_label(&mut self, index_label: impl Into<String>) -> &mut Self {
self.index_label = index_label.into();
self
}
pub fn offset(&mut self, offset: usize) -> &mut Self {
self.offset = offset;
self
}
pub fn verticalbar(&mut self, verticalbar: impl IntoIterator<Item = usize>) -> &mut Self {
self.verticalbars.extend(verticalbar);
self
}
pub fn table_name(&mut self, table_name: impl Into<String>) -> &mut Self {
self.table_name = table_name.into();
self
}
pub fn row(
&mut self,
label: impl Into<String>,
values: impl IntoIterator<Item = impl fmt::Debug>,
) -> &mut Self {
self.rows.push(Row {
label: label.into(),
values: values
.into_iter()
.map(|value| __quiet(format!("{:?}", value)))
.collect(),
});
self
}
pub fn to_string_table(self) -> StringTable {
let Self {
line_number,
index_label,
offset,
verticalbars,
table_name,
rows,
} = self;
let w = rows
.iter()
.map(|row| row.values.len())
.max()
.unwrap_or_default();
let mut verticalbar_count = vec![0; w + 1];
for &v in &verticalbars {
if (offset..=offset + w).contains(&v) {
verticalbar_count[v - offset] += 1;
}
}
StringTable {
head: StringRow {
label: format!(
"{line_number}❯ {table_name}{index_label}",
index_label = if index_label.is_empty() {
String::new()
} else {
format!("[{}]", index_label)
}
),
values: (offset..offset + w)
.map(|index| index.to_string())
.collect(),
},
body: rows
.iter()
.map(|row| StringRow {
label: row.label.clone(),
values: row.values.clone(),
})
.collect(),
verticalbar_count,
}
}
}
struct Row {
label: String,
values: Vec<String>,
}
#[doc(hidden)]
pub struct StringTable {
head: StringRow,
body: Vec<StringRow>,
verticalbar_count: Vec<usize>,
}
impl fmt::Display for StringTable {
fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
let Self {
head,
body,
verticalbar_count,
} = self;
let w = body
.iter()
.map(|row| row.values.len())
.max()
.unwrap_or_default();
let label_width = once(head.label.chars().count())
.chain(body.iter().map(|row| row.label.chars().count()))
.max()
.unwrap();
let value_width = (0..w)
.map(|j| {
once(j.to_string().len())
.chain(
body.iter()
.map(|row| row.values.get(j).map_or(0, |s| s.chars().count())),
)
.max()
.unwrap()
})
.collect::<Vec<_>>();
// Heading
gray(f)?;
write!(
f,
"{}",
head.to_string(label_width, &value_width, verticalbar_count, true)
)?;
resetln(f)?;
// Body
for row in body {
write!(
f,
"{}",
row.to_string(label_width, &value_width, verticalbar_count, false)
)?;
writeln!(f)?;
}
Ok(())
}
}
struct StringRow {
label: String,
values: Vec<String>,
}
impl StringRow {
fn to_string(
&self,
label_width: usize,
value_width: &[usize],
varticalbars_count: &[usize],
label_align_left: bool,
) -> String {
let Self { label, values } = self;
let w = value_width.len();
let mut s = String::new();
s.push_str(&if label_align_left {
format!("{label:<label_width$} |")
} else {
format!("{label:^label_width$} |")
});
for j in 0..w {
let value_width = value_width[j];
s.push_str("|".repeat(varticalbars_count[j]).as_str());
if varticalbars_count[j] == 0 && j != 0 && value_width <= 1 {
s.push(' ');
}
match values.get(j) {
Some(value) => {
s.push_str(&format!(" {value:>value_width$}",));
}
None => {
s.push_str(" ".repeat(value_width + 1).as_str());
}
}
}
s
}
}
const GRAY: &str = "\x1b[48;2;127;127;127;37m";
const RESET: &str = "\x1b[0m";
fn gray(f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{GRAY}")
}
fn resetln(f: &mut fmt::Formatter<'_>) -> fmt::Result {
writeln!(f, "{RESET}")
}
pub fn bools<B, I>(iter: I) -> String
where
B: Borrow<bool>,
I: IntoIterator<Item = B>,
{
format!(
"[{}]",
iter.into_iter()
.map(|b| ['.', '#'][usize::from(*(b.borrow()))])
.collect::<String>(),
)
}
}
// }}}