結果
問題 | No.1059 素敵な集合 |
ユーザー | koba-e964 |
提出日時 | 2020-05-22 23:13:31 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 39 ms / 2,000 ms |
コード長 | 3,606 bytes |
コンパイル時間 | 14,526 ms |
コンパイル使用メモリ | 389,212 KB |
実行使用メモリ | 6,948 KB |
最終ジャッジ日時 | 2024-07-23 09:34:04 |
合計ジャッジ時間 | 14,707 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(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 | 1 ms
6,816 KB |
testcase_01 | AC | 37 ms
6,944 KB |
testcase_02 | AC | 7 ms
6,944 KB |
testcase_03 | AC | 1 ms
6,940 KB |
testcase_04 | AC | 1 ms
6,940 KB |
testcase_05 | AC | 1 ms
6,944 KB |
testcase_06 | AC | 6 ms
6,940 KB |
testcase_07 | AC | 5 ms
6,940 KB |
testcase_08 | AC | 7 ms
6,940 KB |
testcase_09 | AC | 2 ms
6,948 KB |
testcase_10 | AC | 9 ms
6,944 KB |
testcase_11 | AC | 5 ms
6,940 KB |
testcase_12 | AC | 4 ms
6,940 KB |
testcase_13 | AC | 11 ms
6,940 KB |
testcase_14 | AC | 2 ms
6,944 KB |
testcase_15 | AC | 19 ms
6,944 KB |
testcase_16 | AC | 6 ms
6,944 KB |
testcase_17 | AC | 6 ms
6,940 KB |
testcase_18 | AC | 9 ms
6,940 KB |
testcase_19 | AC | 38 ms
6,940 KB |
testcase_20 | AC | 39 ms
6,944 KB |
testcase_21 | AC | 18 ms
6,940 KB |
ソースコード
#[allow(unused_imports)] use std::cmp::*; #[allow(unused_imports)] use std::collections::*; 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, chars) => { read_value!($next, String).chars().collect::<Vec<char>>() }; ($next:expr, usize1) => { read_value!($next, usize) - 1 }; ($next:expr, [ $t:tt ]) => {{ let len = read_value!($next, usize); (0..len).map(|_| read_value!($next, $t)).collect::<Vec<_>>() }}; ($next:expr, $t:ty) => { $next().parse::<$t>().expect("Parse error") }; } #[allow(unused)] macro_rules! debug { ($($format:tt)*) => (write!(std::io::stderr(), $($format)*).unwrap()); } #[allow(unused)] macro_rules! debugln { ($($format:tt)*) => (writeln!(std::io::stderr(), $($format)*).unwrap()); } /** * 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 solve() { let out = std::io::stdout(); let mut out = BufWriter::new(out.lock()); macro_rules! puts { ($($format:tt)*) => (let _ = write!(out,$($format)*);); } input! { l: usize, r: usize, } let mut uf = UnionFind::new(r + 1); for i in l..=r { for j in 2..=r / i { uf.unite(i, i * j); } } let mut conn = HashSet::new(); for i in l..=r { conn.insert(uf.root(i)); } puts!("{}\n", conn.len() - 1); } fn main() { // In order to avoid potential stack overflow, spawn a new thread. let stack_size = 104_857_600; // 100 MB let thd = std::thread::Builder::new().stack_size(stack_size); thd.spawn(|| solve()).unwrap().join().unwrap(); }