結果
| 問題 |
No.1226 I hate Robot Arms
|
| コンテスト | |
| ユーザー |
 o2c
|
| 提出日時 | 2020-09-12 01:05:48 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 212 ms / 2,000 ms |
| コード長 | 4,410 bytes |
| コンパイル時間 | 12,451 ms |
| コンパイル使用メモリ | 403,788 KB |
| 実行使用メモリ | 15,956 KB |
| 最終ジャッジ日時 | 2025-01-01 23:33:42 |
| 合計ジャッジ時間 | 22,024 ms |
|
ジャッジサーバーID （参考情報） |
judge2 / judge4 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 28 |
コンパイルメッセージ
warning: variable does not need to be mutable
--> src/main.rs:8:338
|
8 | ...read {($($t :tt ) ,*;$n :expr ) =>{{let stdin =::std ::io ::stdin () ;let ret =::std ::io ::BufRead ::lines (stdin .lock () ) .take ($n ) .map (|line |{let line =line .unwrap () ;let mut it =line .split_whitespace () ;_read !(it ;$($t ) ,*) } ) .collect ::<Vec <_ >>() ;ret } } ;($($t :tt ) ,*) =>{{let line =readln () ;let mut it =l...
| ----^^
| |
| help: remove this `mut`
...
104 | ... = read!([usize]);
| -------------- in this macro invocation
|
= note: `#[warn(unused_mut)]` on by default
= note: this warning originates in the macro `read` (in Nightly builds, run with -Z macro-backtrace for more info)
ソースコード
pub fn readln() -> String {
let mut line = String::new();
::std::io::stdin()
.read_line(&mut line)
.unwrap_or_else(|e| panic!("{}", e));
line
}
macro_rules !read {($($t :tt ) ,*;$n :expr ) =>{{let stdin =::std ::io ::stdin () ;let ret =::std ::io ::BufRead ::lines (stdin .lock () ) .take ($n ) .map (|line |{let line =line .unwrap () ;let mut it =line .split_whitespace () ;_read !(it ;$($t ) ,*) } ) .collect ::<Vec <_ >>() ;ret } } ;($($t :tt ) ,*) =>{{let line =readln () ;let mut it =line .split_whitespace () ;_read !(it ;$($t ) ,*) } } ;}
macro_rules !_read {($it :ident ;[char ] ) =>{_read !($it ;String ) .chars () .collect ::<Vec <_ >>() } ;($it :ident ;[u8 ] ) =>{Vec ::from (_read !($it ;String ) .into_bytes () ) } ;($it :ident ;usize1 ) =>{$it .next () .unwrap_or_else (||panic !("input mismatch" ) ) .parse ::<usize >() .unwrap_or_else (|e |panic !("{}" ,e ) ) -1 } ;($it :ident ;[usize1 ] ) =>{$it .map (|s |s .parse ::<usize >() .unwrap_or_else (|e |panic !("{}" ,e ) ) -1 ) .collect ::<Vec <_ >>() } ;($it :ident ;[$t :ty ] ) =>{$it .map (|s |s .parse ::<$t >() .unwrap_or_else (|e |panic !("{}" ,e ) ) ) .collect ::<Vec <_ >>() } ;($it :ident ;$t :ty ) =>{$it .next () .unwrap_or_else (||panic !("input mismatch" ) ) .parse ::<$t >() .unwrap_or_else (|e |panic !("{}" ,e ) ) } ;($it :ident ;$($t :tt ) ,+) =>{($(_read !($it ;$t ) ) ,*) } ;}
struct SegmentTree<T> {
width: usize,
node: Vec<T>,
}
#[allow(dead_code)]
impl<T: Monoid + Copy + Clone> SegmentTree<T> {
fn new(n: usize) -> Self {
let width = n.next_power_of_two();
Self {
width,
node: vec![T::id(); width << 1],
}
}
fn from_vec(a: &[T]) -> Self {
let width = a.len().next_power_of_two();
let mut node = vec![T::id(); width << 1];
for i in 0..a.len() {
node[i + width] = a[i];
}
for i in (1..width).rev() {
node[i] = T::f(node[i << 1], node[1 + (i << 1)]);
}
Self { width, node }
}
fn update(&mut self, idx: usize, v: T) {
let mut now = idx + self.width;
self.node[now] = v;
now = now >> 1;
while now > 0 {
self.node[now] = T::f(self.node[now << 1], self.node[1 + (now << 1)]);
now = now >> 1;
}
}
fn get(&self, idx: usize) -> T {
self.node[idx + self.width]
}
fn prod<R>(&self, range: R) -> T
where
R: std::ops::RangeBounds<usize>,
{
let mut l = match range.start_bound() {
std::ops::Bound::Included(&a) => a,
_ => 0,
} + self.width;
let mut r = match range.end_bound() {
std::ops::Bound::Excluded(&a) => a,
std::ops::Bound::Included(&a) => a + 1,
_ => self.width,
} + self.width;
let mut x = T::id();
let mut y = T::id();
while l < r {
if l % 2 == 1 {
x = T::f(x, self.node[l]);
l += 1;
}
if r % 2 == 1 {
r -= 1;
y = T::f(self.node[r], y);
}
l >>= 1;
r >>= 1;
}
T::f(x, y)
}
}
trait Monoid {
fn id() -> Self;
fn f(a: Self, b: Self) -> Self;
}
type M = (f64, f64, f64, f64, f64);
impl Monoid for M {
fn id() -> Self {
(0.0, 0.0, 0.0, 0.0, 0.0)
}
fn f(a: Self, b: Self) -> Self {
let mut p = a;
let (d, tl, x, y, tr) = b;
let rad = (a.4 + tl).to_radians();
p.4 += tl + tr;
p.2 += d * rad.cos() + x * rad.cos() - y * rad.sin();
p.3 += d * rad.sin() + x * rad.sin() + y * rad.cos();
p
}
}
fn main() {
let (n, q) = read!(usize, usize);
let mut seg = SegmentTree::<M>::from_vec(&vec![(1.0, 0.0, 0.0, 0.0, 0.0); n]);
for _ in 0..q {
let q = read!([usize]);
if q[0] == 0 {
let i = q[1];
let x = q[2] as f64;
let mut p = seg.get(i - 1);
p.1 = x; seg.update(i - 1, p);
} else if q[0] == 1 {
let i = q[1];
let x = q[2] as f64;
let mut p = seg.get(i - 1);
p.0 = x;
seg.update(i - 1, p);
} else {
let i: usize = q[1];
let (_, _, x, y, _) = seg.prod(..i);
println!("{0:.6} {1:.6}", x, y);
} }
}