結果
| 問題 |
No.1779 Magical Swap
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-12-09 20:36:51 |
| 言語 | Rust (1.83.0 + proconio) |
| 結果 |
AC
|
| 実行時間 | 49 ms / 2,000 ms |
| コード長 | 3,253 bytes |
| コンパイル時間 | 19,731 ms |
| コンパイル使用メモリ | 403,264 KB |
| 実行使用メモリ | 12,836 KB |
| 最終ジャッジ日時 | 2024-07-17 13:28:06 |
| 合計ジャッジ時間 | 16,999 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 18 |
ソースコード
use std::io::{Write, BufWriter};
// https://qiita.com/tanakh/items/0ba42c7ca36cd29d0ac8
macro_rules! input {
($($r:tt)*) => {
let stdin = std::io::stdin();
let mut bytes = std::io::Read::bytes(std::io::BufReader::new(stdin.lock()));
let mut next = move || -> String{
bytes.by_ref().map(|r|r.unwrap() as char)
.skip_while(|c|c.is_whitespace())
.take_while(|c|!c.is_whitespace())
.collect()
};
input_inner!{next, $($r)*}
};
}
macro_rules! input_inner {
($next:expr) => {};
($next:expr,) => {};
($next:expr, $var:ident : $t:tt $($r:tt)*) => {
let $var = read_value!($next, $t);
input_inner!{$next $($r)*}
};
}
macro_rules! read_value {
($next:expr, ( $($t:tt),* )) => { ($(read_value!($next, $t)),*) };
($next:expr, [ $t:tt ; $len:expr ]) => {
(0..$len).map(|_| read_value!($next, $t)).collect::<Vec<_>>()
};
($next:expr, [ $t:tt ]) => {{
let len = read_value!($next, usize);
read_value!($next, [$t; len])
}};
($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error"));
}
/**
* Union-Find tree.
* Verified by https://atcoder.jp/contests/pakencamp-2019-day3/submissions/9253305
*/
struct UnionFind { disj: Vec<usize>, rank: Vec<usize> }
impl UnionFind {
fn new(n: usize) -> Self {
let disj = (0..n).collect();
UnionFind { disj: disj, rank: vec![1; n] }
}
fn root(&mut self, x: usize) -> usize {
if x != self.disj[x] {
let par = self.disj[x];
let r = self.root(par);
self.disj[x] = r;
}
self.disj[x]
}
fn unite(&mut self, x: usize, y: usize) {
let mut x = self.root(x);
let mut y = self.root(y);
if x == y { return }
if self.rank[x] > self.rank[y] {
std::mem::swap(&mut x, &mut y);
}
self.disj[x] = y;
self.rank[y] += self.rank[x];
}
#[allow(unused)]
fn is_same_set(&mut self, x: usize, y: usize) -> bool {
self.root(x) == self.root(y)
}
#[allow(unused)]
fn size(&mut self, x: usize) -> usize {
let x = self.root(x);
self.rank[x]
}
}
fn main() {
let out = std::io::stdout();
let mut out = BufWriter::new(out.lock());
macro_rules! puts {($($format:tt)*) => (let _ = write!(out,$($format)*););}
input!(rearr: [[(i64, i64)]]);
for rearr in rearr {
let n = rearr.len();
let mut a = Vec::with_capacity(2 * n);
for (x, y) in rearr {
a.push(x);
a.push(y);
}
let b = a.split_off(n);
let mut uf = UnionFind::new(n);
for k in 2..n + 1 {
for j in 1..n / k {
uf.unite(j * k - 1, (j + 1) * k - 1);
}
}
let mut c = vec![vec![]; n];
let mut d = vec![vec![]; n];
for i in 0..n {
let r = uf.root(i);
c[r].push(a[i]);
d[r].push(b[i]);
}
let ok = (0..n).all(|i| {
c[i].sort_unstable();
d[i].sort_unstable();
c[i] == d[i]
});
puts!("{}\n", if ok { "Yes" } else { "No" });
}
}