結果
問題 | No.1582 Vertexes vs Edges |
ユーザー | koba-e964 |
提出日時 | 2021-12-10 00:47:13 |
言語 | Rust (1.77.0 + proconio) |
結果 |
AC
|
実行時間 | 43 ms / 2,000 ms |
コード長 | 2,666 bytes |
コンパイル時間 | 14,708 ms |
コンパイル使用メモリ | 389,108 KB |
実行使用メモリ | 12,384 KB |
最終ジャッジ日時 | 2024-07-17 17:58:57 |
合計ジャッジ時間 | 16,797 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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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
5,248 KB |
testcase_01 | AC | 1 ms
5,248 KB |
testcase_02 | AC | 1 ms
5,376 KB |
testcase_03 | AC | 1 ms
5,376 KB |
testcase_04 | AC | 2 ms
5,376 KB |
testcase_05 | AC | 26 ms
11,136 KB |
testcase_06 | AC | 2 ms
5,376 KB |
testcase_07 | AC | 5 ms
5,376 KB |
testcase_08 | AC | 14 ms
6,400 KB |
testcase_09 | AC | 25 ms
10,368 KB |
testcase_10 | AC | 16 ms
7,296 KB |
testcase_11 | AC | 3 ms
5,376 KB |
testcase_12 | AC | 11 ms
5,632 KB |
testcase_13 | AC | 20 ms
7,680 KB |
testcase_14 | AC | 20 ms
7,808 KB |
testcase_15 | AC | 28 ms
9,984 KB |
testcase_16 | AC | 14 ms
5,888 KB |
testcase_17 | AC | 20 ms
7,552 KB |
testcase_18 | AC | 33 ms
11,648 KB |
testcase_19 | AC | 20 ms
7,936 KB |
testcase_20 | AC | 19 ms
7,168 KB |
testcase_21 | AC | 16 ms
6,656 KB |
testcase_22 | AC | 29 ms
10,624 KB |
testcase_23 | AC | 12 ms
5,376 KB |
testcase_24 | AC | 6 ms
5,376 KB |
testcase_25 | AC | 16 ms
6,528 KB |
testcase_26 | AC | 13 ms
5,376 KB |
testcase_27 | AC | 31 ms
9,728 KB |
testcase_28 | AC | 9 ms
5,376 KB |
testcase_29 | AC | 25 ms
8,576 KB |
testcase_30 | AC | 15 ms
6,272 KB |
testcase_31 | AC | 25 ms
8,704 KB |
testcase_32 | AC | 11 ms
5,376 KB |
testcase_33 | AC | 43 ms
12,384 KB |
testcase_34 | AC | 43 ms
12,288 KB |
testcase_35 | AC | 42 ms
12,248 KB |
testcase_36 | AC | 1 ms
5,376 KB |
testcase_37 | AC | 1 ms
5,376 KB |
testcase_38 | AC | 1 ms
5,376 KB |
コンパイルメッセージ
warning: unused import: `BufWriter` --> src/main.rs:5:22 | 5 | use std::io::{Write, BufWriter}; | ^^^^^^^^^ | = note: `#[warn(unused_imports)]` on by default warning: unused import: `Write` --> src/main.rs:5:15 | 5 | use std::io::{Write, BufWriter}; | ^^^^^
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); read_value!($next, [$t; len]) }}; ($next:expr, $t:ty) => ($next().parse::<$t>().expect("Parse error")); } trait Change { fn chmax(&mut self, x: Self); fn chmin(&mut self, x: Self); } impl<T: PartialOrd> Change for T { fn chmax(&mut self, x: T) { if *self < x { *self = x; } } fn chmin(&mut self, x: T) { if *self > x { *self = x; } } } 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(); } const INF: i64 = 1 << 50; fn dfs(v: usize, par: usize, g: &[Vec<usize>], dp: &mut [[i64; 2]]) { let mut me = [-INF; 2]; let mut s = 0; let mut mi = INF; for &w in &g[v] { if w == par { continue; } dfs(w, v, g, dp); let poss = max(dp[w][0], dp[w][1]); s += poss; mi = min(mi, poss - dp[w][0]); } me[0] = s; me[1] = s - mi + 1; dp[v] = me; } // Tags: max-matching-on-trees fn solve() { input! { n: usize, ab: [(usize1, usize1); n - 1], } let mut g = vec![vec![]; n]; for &(a, b) in &ab { g[a].push(b); g[b].push(a); } let mut dp = vec![[-INF; 2]; n]; dfs(0, n, &g, &mut dp); println!("{}", max(dp[0][0], dp[0][1])); }